From 88c922353cc353fe148e21c7d27d7c0076d6fdda Mon Sep 17 00:00:00 2001
From: =?utf8?q?Roland=20H=C3=A4der?= <roland@mxchange.org>
Date: Wed, 28 Nov 2012 15:46:32 +0000
Subject: [PATCH] Code moved to other include file: - Moved a lot SQL functions
 which doesn't encapsulate a corresponding   mysql_foo() function to
 sql-functions.php - rewrote loader part - TODOs.txt updated

---
 DOCS/TODOs.txt               |  22 +-
 inc/db/lib-mysql3.php        | 460 -----------------------------------
 inc/extensions-functions.php |  45 +++-
 inc/mysql-connect.php        |  13 +-
 inc/sql-functions.php        | 460 +++++++++++++++++++++++++++++++++++
 5 files changed, 513 insertions(+), 487 deletions(-)

diff --git a/DOCS/TODOs.txt b/DOCS/TODOs.txt
index 6488912587..d88844211d 100644
--- a/DOCS/TODOs.txt
+++ b/DOCS/TODOs.txt
@@ -45,10 +45,10 @@
 ./inc/extensions/ext-nickname.php:52:		// @TODO NOT NULL DEFAULT '' is bad practice, use NULL
 ./inc/extensions/ext-yoomedia.php:121:		// @TODO Can this be moved into a database table?
 ./inc/extensions/ext-yoomedia.php:54:// @TODO Only deprecated when 'ext-network' is ready! setExtensionDeprecated('Y');
-./inc/extensions-functions.php:2176:// @TODO This should be rewrittten to allow, more development states, e.g. 'planing','alpha','beta','beta2','stable'
-./inc/extensions-functions.php:424:	// @TODO This redirect is still needed to register sql_patches! Please try to avoid it
-./inc/extensions-functions.php:440:// @TODO Change from ext_id to ext_name (not just even the variable! ;-) )
-./inc/extensions-functions.php:580:		// @TODO Extension is loaded, what next?
+./inc/extensions-functions.php:2181:// @TODO This should be rewrittten to allow, more development states, e.g. 'planing','alpha','beta','beta2','stable'
+./inc/extensions-functions.php:429:	// @TODO This redirect is still needed to register sql_patches! Please try to avoid it
+./inc/extensions-functions.php:445:// @TODO Change from ext_id to ext_name (not just even the variable! ;-) )
+./inc/extensions-functions.php:585:		// @TODO Extension is loaded, what next?
 ./inc/filter/bonus_filter.php:56:		// @TODO This query isn't right, it will only update if the user was for a longer time away!
 ./inc/filter/cache_filter.php:94:		// @TODO This should be rewritten not to load the cache file for just checking if it is there for save removal.
 ./inc/filter/forced_filter.php:73:		// @TODO This part is unfinished
@@ -180,13 +180,13 @@
 ./inc/modules/member/what-unconfirmed.php:178:	// @TODO Try to rewrite this to $content = SQL_FETCHARRAY()
 ./inc/modules/member/what-unconfirmed.php:247:				// @TODO This 'userid' cannot be saved because of encapsulated EL code
 ./inc/modules/order.php:78:		// @TODO Unused: 2,4
-./inc/mysql-manager.php:1440:		// @TODO Rewrite these lines to a filter
-./inc/mysql-manager.php:1464:	// @TODO Rewrite this to a filter
-./inc/mysql-manager.php:1770:			// @TODO Rewrite this to a filter
-./inc/mysql-manager.php:1967:				// @TODO If we can rewrite the EL sub-system to support more than one parameter, this call_user_func_array() can be avoided
-./inc/mysql-manager.php:2090:			// @TODO Used generic 'userid' here
-./inc/mysql-manager.php:2311:// @TODO cacheFiles is not yet supported
-./inc/mysql-manager.php:398:	// @TODO Try to rewrite this to one or more functions
+./inc/mysql-manager.php:1450:		// @TODO Rewrite these lines to a filter
+./inc/mysql-manager.php:1474:	// @TODO Rewrite this to a filter
+./inc/mysql-manager.php:1780:			// @TODO Rewrite this to a filter
+./inc/mysql-manager.php:1977:				// @TODO If we can rewrite the EL sub-system to support more than one parameter, this call_user_func_array() can be avoided
+./inc/mysql-manager.php:2100:			// @TODO Used generic 'userid' here
+./inc/mysql-manager.php:2321:// @TODO cacheFiles is not yet supported
+./inc/mysql-manager.php:408:	// @TODO Try to rewrite this to one or more functions
 ./inc/mysql-manager.php:44:// @TODO Can we cache this?
 ./inc/purge/purge-inact.php:55:	// @TODO Rewrite these if() blocks to a filter
 ./inc/revision-functions.php:168:// @TODO This function does also set and get in 'cache_array'
diff --git a/inc/db/lib-mysql3.php b/inc/db/lib-mysql3.php
index e9ebc79cfc..e577551244 100644
--- a/inc/db/lib-mysql3.php
+++ b/inc/db/lib-mysql3.php
@@ -266,37 +266,6 @@ function SQL_FREERESULT ($resource) {
 	return $res;
 }
 
-// SQL string escaping
-function SQL_QUERY_ESC ($sqlString, $data, $F, $L, $run = TRUE, $strip = TRUE, $secure = TRUE) {
-	// Link is there?
-	if ((!SQL_IS_LINK_UP()) || (!is_array($data))) {
-		// Link is down or data is not an array
-		/* DEBUG: */ logDebugMessage($F, $L, 'SQL_IS_LINK_UP()=' . intval(SQL_IS_LINK_UP()) . ',data[]=' . gettype($data) . ',sqlString=' . $sqlString . ': ABORTING!');
-		return FALSE;
-	} // END - if
-
-	// Init array for escape'd data with SQL string
-	$dataSecured = array(
-		'__sql_string' => $sqlString
-	);
-
-	// Escape all data
-	foreach ($data as $key => $value) {
-		$dataSecured[$key] = SQL_ESCAPE($value, $secure, $strip);
-	} // END - foreach
-
-	// Generate query
-	$query = call_user_func_array('sprintf', $dataSecured);
-
-	if ($run === TRUE) {
-		// Run SQL query (default)
-		return SQL_QUERY($query, $F, $L);
-	} else {
-		// Return secured string
-		return $query;
-	}
-}
-
 // Get id from last INSERT command
 function SQL_INSERTID () {
 	if (!SQL_IS_LINK_UP()) return FALSE;
@@ -365,253 +334,6 @@ function SQL_ESCAPE ($str, $secureString = TRUE, $strip = TRUE) {
 	return $GLOBALS['sql_escapes']['' . $str . ''];
 }
 
-// SELECT query string from table, columns and so on... ;-)
-function SQL_RESULT_FROM_ARRAY ($table, $columns, $idRow, $id, $F, $L) {
-	// Is columns an array?
-	if (!is_array($columns)) {
-		// No array
-		reportBug(__FUNCTION__, __LINE__, sprintf("columns is not an array. %s != array, file=%s, line=%s",
-			gettype($columns),
-			basename($F),
-			$L
-		));
-
-		// Abort here with 'false'
-		return FALSE;
-	} // END  - if
-
-	// Is this is a simple array?
-	if ((is_array($columns[0])) && (isset($columns[0]['column']))) {
-		// Begin with SQL query
-		$sql = 'SELECT ';
-
-		// No, it comes from XML, so get it back from it
-		$sql .= getSqlPartFromXmlArray($columns);
-
-		// Finalize it
-		$sql .= " FROM `{?_MYSQL_PREFIX?}_%s` WHERE `%s`='%s' LIMIT 1";
-	} else {
-		// Yes, prepare the SQL statement
-		$sql = 'SELECT `' . implode('`, `', $columns) . "` FROM `{?_MYSQL_PREFIX?}_%s` WHERE `%s`='%s' LIMIT 1";
-	}
-
-	// Return the result
-	return SQL_QUERY_ESC($sql,
-		array(
-			$table,
-			$idRow,
-			bigintval($id),
-		), $F, $L
-	);
-}
-
-// ALTER TABLE wrapper function
-function SQL_ALTER_TABLE ($sql, $F, $L, $enableCodes = TRUE) {
-	// Abort if link is down
-	if (!SQL_IS_LINK_UP()) return FALSE;
-
-	// This is the default result...
-	$result = FALSE;
-
-	// Determine index/fulltext/unique word
-	$isAlterIndex = (
-		(
-			isInString('INDEX', $sql)
-		) || (
-			isInString('KEY', $sql)
-		) || (
-			isInString('FULLTEXT', $sql)
-		) || (
-			isInString('UNIQUE', $sql)
-		)
-	);
-
-	// Extract table name
-	$tableArray = explode(' ', $sql);
-	$tableName = str_replace('`', '', $tableArray[2]);
-
-	// Debug log
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ',tableName=' . $tableName . ',tableArray=<pre>' . print_r($tableArray, TRUE) . '</pre>,isAlterIndex=' . intval($isAlterIndex));
-
-	// Shall we add/drop?
-	if (((isInString('ADD', $sql)) || (isInString('DROP', $sql)) || (isInString('CHANGE', $sql))) && ($isAlterIndex === FALSE)) {
-		// Try two columns, one should fix
-		foreach (array(4,5) as $idx) {
-			// If an entry is not set, abort here
-			if (!isset($tableArray[$idx])) {
-				// Debug log this
-				logDebugMessage(__FUNCTION__, __LINE__, 'columnName=' . $columnName . ',idx=' . $idx . ',sql=' . $sql . ' is missing!');
-				break;
-			} // END - if
-
-			// And column name as well
-			$columnName = $tableArray[$idx];
-
-			// Debug log
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'columnName=' . $columnName . ',idx=' . $idx . ',sql=' . $sql . ',hasZeroNums=' . intval(ifSqlTableColumnExists($tableName, $columnName)));
-
-			// Is there no entry on ADD or an entry on DROP/CHANGE?
-			if (((!ifSqlTableColumnExists($tableName, $columnName)) && (isInString('ADD', $sql))) || ((ifSqlTableColumnExists($tableName, $columnName)) && ((isInString('DROP', $sql)) || ((isInString('CHANGE', $sql)) && ($idx == 4) && ((!ifSqlTableColumnExists($tableName, $tableArray[5])) || ($columnName == $tableArray[5])))))) {
-				// Do the query
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Executing: ' . $sql);
-				$result = SQL_QUERY($sql, $F, $L, FALSE);
-
-				// Skip further attempt(s)
-				break;
-			} elseif ((((ifSqlTableColumnExists($tableName, $columnName)) && (isInString('ADD', $sql))) || ((!ifSqlTableColumnExists($tableName, $columnName)) && ((isInString('DROP', $sql))) || (isInString('CHANGE', $sql)))) && ($columnName != 'KEY')) {
-				// Abort here because it is alreay there
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Skipped: sql=' . $sql . ',columnName=' . $columnName . ',idx=' . $idx);
-				break;
-			} elseif ((!ifSqlTableColumnExists($tableName, $columnName)) && (isInString('DROP', $sql))) {
-				// Abort here because we tried to drop a column which is not there (never created maybe)
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'No drop: ' . $sql);
-				break;
-			} elseif ($columnName != 'KEY') {
-				// Something didn't fit, we better log it
-				logDebugMessage(__FUNCTION__, __LINE__, 'Possible problem: ' . $sql . ',hasZeroNums=' . intval(ifSqlTableColumnExists($tableName, $columnName)) . '');
-			}
-		} // END - foreach
-	} elseif ((getTableType() == 'InnoDB') && (isInString('FULLTEXT', $sql))) {
-		// Skip this query silently because InnoDB does not understand fulltext indexes
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, sprintf("Skipped FULLTEXT: sql=%s,tableName=%s,hasZeroNums=%d,file=%s,line=%s", $sql, $tableName, intval((is_bool($result)) ? 0 : ifSqlTableColumnExists($columnName)), $F, $L));
-	} elseif ($isAlterIndex === TRUE) {
-		// And column name as well without backticks
-		$keyName = str_replace('`', '', $tableArray[5]);
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . ',tableArray=<pre>' . print_r($tableArray, TRUE) . '</pre>');
-
-		// Is this "UNIQUE" or so? FULLTEXT has been handled the elseif() block above
-		if (in_array(strtoupper($tableArray[4]), array('INDEX', 'UNIQUE', 'KEY', 'FULLTEXT'))) {
-			// Init loop
-			$begin = 1;
-			$keyName = ',';
-			while (isInString(',', $keyName)) {
-				// Use last
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - BEFORE');
-				$keyName = str_replace('`', '', $tableArray[count($tableArray) - $begin]);
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - BETWEEN');
-
-				// Remove brackes
-				$keyName = str_replace(array('(', ')'), array('', ''), $keyName);
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - AFTER');
-
-				// Continue
-				$begin++;
-			} // END while
-		} // END - if
-
-		// Shall we run it?
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ', tableArray[3]=' . $tableArray[3] . ',keyName=' . $keyName);
-		if (($tableArray[3] == 'ADD') && (!ifSqlTableIndexExist($tableName, $keyName))) {
-			// Send it to the SQL_QUERY() function to add it
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ' - ADDING!');
-			$result = SQL_QUERY($sql, $F, $L, $enableCodes);
-		} elseif (($tableArray[3] == 'DROP') && (ifSqlTableIndexExist($tableName, $keyName))) {
-			// Send it to the SQL_QUERY() function to drop it
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ' - DROPPING!');
-			$result = SQL_QUERY($sql, $F, $L, $enableCodes);
-		} else {
-			// Not executed
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Not executed: ' . $sql);
-		}
-	} else {
-		// Other ALTER TABLE query
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, $sql);
-		$result = SQL_QUERY($sql, $F, $L, $enableCodes);
-	}
-
-	// Return result
-	return $result;
-}
-
-// Getter for SQL link
-function SQL_GET_LINK () {
-	// Init link
-	$link = NULL;
-
-	// Is it in the globals?
-	if (isset($GLOBALS['sql_link'])) {
-		// Then take it
-		$link = $GLOBALS['sql_link'];
-	} // END - if
-
-	// Return it
-	return $link;
-}
-
-// Setter for link
-function SQL_SET_LINK ($link) {
-	// Is this a resource or null?
-	if ((ifFatalErrorsDetected()) && (isInstallationPhase())) {
-		// This may happen in installation phase
-		return;
-	} elseif ((!is_resource($link)) && (!is_null($link))) {
-		// This should never happen!
-		reportBug(__FUNCTION__, __LINE__, sprintf("Type of link is not resource or null, type=%s", gettype($link)));
-	} // END - if
-
-	// Set it
-	$GLOBALS['sql_link'] = $link;
-
-	// Re-init cache
-	$GLOBALS['is_sql_link_up'] = is_resource($link);
-}
-
-// Checks if the link is up
-function SQL_IS_LINK_UP () {
-	// Is there cached this?
-	if (!isset($GLOBALS['is_sql_link_up'])) {
-		// Determine it
-		$GLOBALS['is_sql_link_up'] = is_resource(SQL_GET_LINK());
-	} // END - if
-
-	// Return the result
-	return $GLOBALS['is_sql_link_up'];
-}
-
-// Wrapper function to make code more readable
-function SQL_HASZERONUMS ($result) {
-	// Just pass it through
-	return (SQL_NUMROWS($result) === 0);
-}
-
-// Wrapper function to make code more readable
-function SQL_HASZEROAFFECTED () {
-	// Just pass it through
-	return (SQL_AFFECTEDROWS() === 0);
-}
-
-// Private function to prepare the SQL query string
-function SQL_PREPARE_SQL_STRING ($sqlString, $enableCodes = TRUE) {
-	// Debug message
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ',enableCodes=' . intval($enableCodes) . ' - ENTERED!');
-
-	// Is it already cached?
-	if (!isset($GLOBALS['sql_strings']['' . $sqlString . ''])) {
-		// Preserve escaping and compile URI codes+config+expression code
-		$sqlString2 = FILTER_COMPILE_EXPRESSION_CODE(FILTER_COMPILE_CONFIG($sqlString));
-
-		// Debug message
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString2=' . $sqlString2);
-
-		// Do final compilation and revert {ESCAPE}
-		$GLOBALS['sql_strings']['' . $sqlString . ''] = doFinalCompilation($sqlString2, FALSE, $enableCodes);
-	} else {
-		// Log message
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ' - CACHE!');
-	}
-
-	// Debug message
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ',enableCodes=' . intval($enableCodes) . ',sql_strings=' . $GLOBALS['sql_strings']['' . $sqlString . ''] . ' - EXIT!');
-
-	// Return it
-	return $GLOBALS['sql_strings']['' . $sqlString . ''];
-}
-
-// Creates a MySQL TIMESTAMP compatible string from given Uni* timestamp
-function SQL_EPOCHE_TO_TIMESTAMP ($timestamp) {
-	return generateDateTime($timestamp, 7);
-}
-
 // Log SQL errors to debug.log in installation phase or call reportBug()
 function SQL_ERROR ($file, $line, $message) {
 	// Remember plain error in last_sql_error
@@ -630,187 +352,5 @@ function SQL_ERROR ($file, $line, $message) {
 	}
 }
 
-// Check if there is a SQL table created
-function ifSqlTableExists ($tableName) {
-	// Make sure double-prefixes are being removed
-	$tableName = str_replace('{?_MYSQL_PREFIX?}_', '', $tableName);
-
-	// Log message
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ' - ENTERED!');
-
-	// Is there cache?
-	if (!isset($GLOBALS[__FUNCTION__][$tableName])) {
-		// Check if the table is there
-		$result = SQL_QUERY_ESC("SHOW TABLES FROM `{?__DB_NAME?}` WHERE `Tables_in_{?__DB_NAME?}`='{?_MYSQL_PREFIX?}_%s'",
-			array($tableName), __FILE__, __LINE__);
-
-		// Is a link there?
-		if (!is_resource($result)) {
-			// Is installation phase?
-			if (isInstallationPhase()) {
-				// Then silently abort here
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ' - Returning FALSE ...');
-				return FALSE;
-			} else {
-				// Please report this
-				reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
-			}
-		} // END - if
-
-		// Is there an entry?
-		$GLOBALS[__FUNCTION__][$tableName] = (SQL_NUMROWS($result) == 1);
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',numRows=' . intval($GLOBALS[__FUNCTION__][$tableName]));
-	} // END - if
-
-	// Return cache
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',result=' . intval($GLOBALS[__FUNCTION__][$tableName]) . ' - EXIT!');
-	return $GLOBALS[__FUNCTION__][$tableName];
-}
-
-// Is a table column there?
-function ifSqlTableColumnExists ($tableName, $columnName, $forceFound = FALSE) {
-	// Remove back-ticks
-	$columnName = str_replace('`', '', $columnName);
-
-	// Debug message
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',columnName=' . $columnName . ' - ENTERED!');
-
-	// If the table is not there, it is okay
-	if (!ifSqlTableExists($tableName)) {
-		// Then abort here
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Table ' . $tableName . ' does not exist, columnName=' . $columnName . ',forceFound=' . intval($forceFound));
-		return (($forceFound === FALSE) && (isInstallationPhase()));
-	} // END - if
-
-	// Get column information
-	$result = SQL_QUERY_ESC("SHOW COLUMNS FROM `%s` LIKE '%s'",
-		array(
-			$tableName,
-			$columnName
-		), __FUNCTION__, __LINE__);
-
-	// Is a link there?
-	if (!is_resource($result)) {
-		// Is installation phase?
-		if (isInstallationPhase()) {
-			// Then silently abort here
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ',columnName=' . $columnName . ' - Returning FALSE ...');
-			return $forceFound;
-		} else {
-			// Please report this
-			reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
-		}
-	} // END - if
-
-	// Determine it
-	$doesExist = (!SQL_HASZERONUMS($result));
-
-	// Free result
-	SQL_FREERESULT($result);
-
-	// Return cache
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',columnName=' . $columnName . ',doesExist=' . intval($doesExist) . ' - EXIT!');
-	return $doesExist;
-}
-
-// Checks depending on the mode if the index is there
-function ifSqlTableIndexExist ($tableName, $keyName, $forceFound = FALSE) {
-	// Remove back-ticks
-	$keyName = str_replace('`', '', $keyName);
-
-	// Debug message
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',keyName=' . $keyName . ' - ENTERED!');
-
-	// If the table is not there, it is okay
-	if (!ifSqlTableExists($tableName)) {
-		// Then abort here
-		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Table ' . $tableName . ' does not exist, keyName=' . $keyName . ',forceFound=' . intval($forceFound));
-		return (($forceFound === FALSE) && (isInstallationPhase()));
-	} // END - if
-
-	// Show indexes
-	$result = SQL_QUERY_ESC("SHOW INDEX FROM `%s`", array($tableName), __FUNCTION__, __LINE__);
-
-	// Is a link there?
-	if (!is_resource($result)) {
-		// Is installation phase?
-		if (isInstallationPhase()) {
-			// Then silently abort here
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ',keyName=' . $keyName . ' - Returning FALSE ...');
-			return $forceFound;
-		} else {
-			// Please report this
-			reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
-		}
-	} // END - if
-
-	// The key is not found by default
-	$doesExist = FALSE;
-
-	// Walk through all
-	while ($content = SQL_FETCHARRAY($result)) {
-		// Is it the requested one?
-		if ($content['Key_name'] == $keyName) {
-			// Then it is found and exit
-			$doesExist = TRUE;
-			break;
-		} // END - if
-	} // END - while
-
-	// Free result
-	SQL_FREERESULT($result);
-
-	// Return cache
-	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',keyName=' . $keyName . ',doesExist=' . intval($doesExist) . ' - EXIT!');
-	return $doesExist;
-}
-
-// Init database layer
-function initDatabaseLayer () {
-	// Set all required variables:
-	$GLOBALS['last_sql_error'] = '';
-}
-
-// Get last SQL error
-function getLastSqlError () {
-	return $GLOBALS['last_sql_error'];
-}
-
-// Gets an array (or false if none is found) from all supported engines
-function getArrayFromSupportedSqlEngines ($requestedEngine = 'ALL') {
-	// Init array
-	$engines = array();
-
-	// This also worked, now we need to check if the selected database type is supported
-	$result = SQL_QUERY('SHOW ENGINES', __FUNCTION__, __LINE__);
-
-	// Are there entries? (Bad if not)
-	if (!SQL_HASZERONUMS($result)) {
-		// Load all and check for active entries
-		while ($content = SQL_FETCHARRAY($result)) {
-			// Debug message
-			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'support=' . $requestedEngine . ',Engine=' . $content['Engine'] . ',Support=' . $content['Support']);
-
-			// Is this supported?
-			if ((($requestedEngine == 'ALL') || ($content['Engine'] == $requestedEngine)) && (in_array($content['Support'], array('YES', 'DEFAULT')))) {
-				// Add it
-				array_push($engines, $content);
-			} elseif (isDebugModeEnabled()) {
-				// Log it away in debug mode
-				logDebugMessage(__FUNCTION__, __LINE__, 'Engine ' . $content['Engine'] . ' is not supported (' . $content['Supported'] . ' - ' . $requestedEngine . ')');
-			}
-		} // END - if
-	} else {
-		// No engines! :(
-		$engines = FALSE;
-	}
-
-	// Free result
-	SQL_FREERESULT($result);
-
-	// Return result
-	return $engines;
-}
-
 // [EOF]
 ?>
diff --git a/inc/extensions-functions.php b/inc/extensions-functions.php
index e6fcb897ee..3a5696cd6b 100644
--- a/inc/extensions-functions.php
+++ b/inc/extensions-functions.php
@@ -120,7 +120,7 @@ function loadExtension ($ext_name, $ext_mode, $ext_ver = '0.0.0', $isDryRun = FA
 	} // END - if
 
 	// Load extension's own language file if not in test mode
-	if ((getExtensionMode() != 'test') && (ifExtensionHasLanguageFile($ext_name))) {
+	if ((getExtensionMode() != 'test') && (isExtensionLanguageFileReadable($ext_name))) {
 		// Load it
 		loadLanguageFile($ext_name);
 	} // END - if
@@ -359,40 +359,45 @@ function registerExtension ($ext_name, $taskId, $isDryRun = FALSE, $ignoreUpdate
 				// Run installation pre-installation filters
 				runFilterChain('pre_extension_installed', array('dry_run' => isExtensionDryRun(), 'ext_installing' => TRUE, 'enable_codes' => FALSE));
 
+				// Copy current name to save calls
+				$currentName = getCurrentExtensionName();
+
 				// Register extension
-				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'insert=' . getCurrentExtensionName() . '/' . getCurrentExtensionVersion() . ' - INSERT!');
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'insert=' . $currentName . '/' . getCurrentExtensionVersion() . ' - INSERT!');
 				if (isExtensionInstalledAndNewer('sql_patches', '0.0.6')) {
 					// New way, with CSS
-					//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'ext_name=' . getCurrentExtensionName() . ',always_active=' . getThisExtensionAlwaysActive() . ', ext_ver=' . getCurrentExtensionVersion() . 'ext_css=' . getExtensionHasCss());
+					//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'ext_name=' . $currentName . ',always_active=' . getThisExtensionAlwaysActive() . ', ext_ver=' . getCurrentExtensionVersion() . 'ext_css=' . getExtensionHasCss());
 					SQL_QUERY_ESC("INSERT INTO `{?_MYSQL_PREFIX?}_extensions` (`ext_name`, `ext_active`, `ext_version`, `ext_has_css`) VALUES ('%s','%s','%s','%s')",
 						array(
-							getCurrentExtensionName(),
+							$currentName,
 							getThisExtensionAlwaysActive(),
 							getCurrentExtensionVersion(),
 							getExtensionHasCss()
 						), __FUNCTION__, __LINE__);
 				} else {
 					// Old way, no CSS
-					//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'ext_name=' . getCurrentExtensionName() . ',always_active=' . getThisExtensionAlwaysActive() . ', ext_ver=' . getCurrentExtensionVersion());
+					//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'ext_name=' . $currentName . ',always_active=' . getThisExtensionAlwaysActive() . ', ext_ver=' . getCurrentExtensionVersion());
 					SQL_QUERY_ESC("INSERT INTO `{?_MYSQL_PREFIX?}_extensions` (`ext_name`, `ext_active`, `ext_version`) VALUES ('%s','%s','%s')",
 						array(
-							getCurrentExtensionName(),
+							$currentName,
 							getThisExtensionAlwaysActive(),
 							getCurrentExtensionVersion()
 						), __FUNCTION__, __LINE__);
 				}
 
-				// Use the insert id as extension id and cache it for early usage
-				$GLOBALS['cache_array']['extension']['ext_id'][getCurrentExtensionName()] = SQL_INSERTID();
-				$GLOBALS['cache_array']['extension']['ext_name'][SQL_INSERTID()] = getCurrentExtensionName();
+				/*
+				 * Use the insert id as extension id and "cache" all data for
+				 * this extension for early usage.
+				 */
+				copyCurrentExtensionDataToCacheArray($ext_name, SQL_INSERTID());
 
 				// Mark it as installed
-				$GLOBALS['ext_is_installed'][getCurrentExtensionName()] = TRUE;
+				$GLOBALS['ext_is_installed'][$currentName] = TRUE;
 
 				// Remove cache file(s) if extension is active
 				runFilterChain('post_extension_installed', array(
 					'pool'     => 'extension',
-					'ext_name' => getCurrentExtensionName(),
+					'ext_name' => $currentName,
 					'task_id'  => $taskId
 				));
 
@@ -1754,8 +1759,8 @@ function getExtensionHasCss () {
 	return $GLOBALS[__FUNCTION__][getCurrentExtensionName()][getCurrentTheme()];
 }
 
-// Checks whether the given extension has a language file
-function ifExtensionHasLanguageFile ($ext_name) {
+// Checks whether the given extension's language file is readable
+function isExtensionLanguageFileReadable ($ext_name) {
 	// Is there cache?
 	if (isset($GLOBALS['cache_array']['extension']['ext_lang'][$ext_name])) {
 		// Count cache hits
@@ -2246,5 +2251,19 @@ function isExtensionLibraryLoaded ($ext_name) {
 	return ((isset($GLOBALS['ext_loaded']['library'][$ext_name])) && ($GLOBALS['ext_loaded']['library'][$ext_name] === TRUE));
 }
 
+// Copies the given extension's data to cache_array (USE THIS ONLY IN REGISTRATION PHASE!)
+function copyExtensionDataToCacheArray ($ext_name, $ext_id) {
+	// Copy all data
+	$GLOBALS['cache_array']['extension']['ext_id'][$currentName]         = $ext_id;
+	$GLOBALS['cache_array']['extension']['ext_name'][$ext_id]            = $currentName;
+	$GLOBALS['cache_array']['extension']['ext_version'][$currentName]    = getCurrentExtensionVersion();
+	$GLOBALS['cache_array']['extension']['ext_active'][$currentName]     = getThisExtensionAlwaysActive();
+	$GLOBALS['cache_array']['extension']['ext_lang'][$currentName]       = convertBooleanToYesNo(isExtensionLanguageFileReadable($currentName));
+	$GLOBALS['cache_array']['extension']['ext_func'][$currentName]       = convertBooleanToYesNo(isExtensionFunctionFileReadable($currentName));
+	$GLOBALS['cache_array']['extension']['ext_menu'][$currentName]       = convertBooleanToYesNo(ifModuleHasMenu($currentName));
+	$GLOBALS['cache_array']['extension']['ext_css'][$currentName]        = convertBooleanToYesNo(getExtensionHasCss());
+	$GLOBALS['cache_array']['extension']['ext_deprecated'][$currentName] = 'N';
+}
+
 // [EOF]
 ?>
diff --git a/inc/mysql-connect.php b/inc/mysql-connect.php
index 77eb4bb074..f94fdb8b40 100644
--- a/inc/mysql-connect.php
+++ b/inc/mysql-connect.php
@@ -40,6 +40,9 @@ if (!defined('__SECURITY')) {
 	die();
 } // END - if
 
+// Init array
+$__functions = array();
+
 // Init include file array as it follows same naming scheme
 foreach ( array(
 		'stats',
@@ -56,16 +59,20 @@ foreach ( array(
 		'filter',
 		'revision',
 		'extensions') as $lib) {
-	// Load special functions
-	loadIncludeOnce('inc/' . $lib . '-functions.php');
+
+	// Add it
+	$__functions[] = $lib . '-functions';
 } // END - foreach
 
 // Load more function libraries or includes
-foreach (array('filters', 'mysql-manager', 'handler') as $lib) {
+foreach (array_merge($__functions, array('filters', 'mysql-manager', 'handler')) as $lib) {
 	// Load special functions
 	loadIncludeOnce('inc/' . $lib . '.php');
 } // END - foreach
 
+// Remove array
+unset($__functions);
+
 // Set error handler
 set_error_handler('__errorHandler');
 
diff --git a/inc/sql-functions.php b/inc/sql-functions.php
index e61f393804..671a866744 100644
--- a/inc/sql-functions.php
+++ b/inc/sql-functions.php
@@ -278,5 +278,465 @@ function importSqlDump ($path, $dumpName, $sqlPool) {
 	mergeSqls(explode(";\n", $fileContent), $sqlPool);
 }
 
+// SQL string escaping
+function SQL_QUERY_ESC ($sqlString, $data, $F, $L, $run = TRUE, $strip = TRUE, $secure = TRUE) {
+	// Link is there?
+	if ((!SQL_IS_LINK_UP()) || (!is_array($data))) {
+		// Link is down or data is not an array
+		/* DEBUG: */ logDebugMessage($F, $L, 'SQL_IS_LINK_UP()=' . intval(SQL_IS_LINK_UP()) . ',data[]=' . gettype($data) . ',sqlString=' . $sqlString . ': ABORTING!');
+		return FALSE;
+	} // END - if
+
+	// Init array for escape'd data with SQL string
+	$dataSecured = array(
+		'__sql_string' => $sqlString
+	);
+
+	// Escape all data
+	foreach ($data as $key => $value) {
+		$dataSecured[$key] = SQL_ESCAPE($value, $secure, $strip);
+	} // END - foreach
+
+	// Generate query
+	$query = call_user_func_array('sprintf', $dataSecured);
+
+	if ($run === TRUE) {
+		// Run SQL query (default)
+		return SQL_QUERY($query, $F, $L);
+	} else {
+		// Return secured string
+		return $query;
+	}
+}
+
+// SELECT query string from table, columns and so on... ;-)
+function SQL_RESULT_FROM_ARRAY ($table, $columns, $idRow, $id, $F, $L) {
+	// Is columns an array?
+	if (!is_array($columns)) {
+		// No array
+		reportBug(__FUNCTION__, __LINE__, sprintf("columns is not an array. %s != array, file=%s, line=%s",
+			gettype($columns),
+			basename($F),
+			$L
+		));
+
+		// Abort here with 'false'
+		return FALSE;
+	} // END  - if
+
+	// Is this is a simple array?
+	if ((is_array($columns[0])) && (isset($columns[0]['column']))) {
+		// Begin with SQL query
+		$sql = 'SELECT ';
+
+		// No, it comes from XML, so get it back from it
+		$sql .= getSqlPartFromXmlArray($columns);
+
+		// Finalize it
+		$sql .= " FROM `{?_MYSQL_PREFIX?}_%s` WHERE `%s`='%s' LIMIT 1";
+	} else {
+		// Yes, prepare the SQL statement
+		$sql = 'SELECT `' . implode('`, `', $columns) . "` FROM `{?_MYSQL_PREFIX?}_%s` WHERE `%s`='%s' LIMIT 1";
+	}
+
+	// Return the result
+	return SQL_QUERY_ESC($sql,
+		array(
+			$table,
+			$idRow,
+			bigintval($id),
+		), $F, $L
+	);
+}
+
+// ALTER TABLE wrapper function
+function SQL_ALTER_TABLE ($sql, $F, $L, $enableCodes = TRUE) {
+	// Abort if link is down
+	if (!SQL_IS_LINK_UP()) return FALSE;
+
+	// This is the default result...
+	$result = FALSE;
+
+	// Determine index/fulltext/unique word
+	$isAlterIndex = (
+		(
+			isInString('INDEX', $sql)
+		) || (
+			isInString('KEY', $sql)
+		) || (
+			isInString('FULLTEXT', $sql)
+		) || (
+			isInString('UNIQUE', $sql)
+		)
+	);
+
+	// Extract table name
+	$tableArray = explode(' ', $sql);
+	$tableName = str_replace('`', '', $tableArray[2]);
+
+	// Debug log
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ',tableName=' . $tableName . ',tableArray=<pre>' . print_r($tableArray, TRUE) . '</pre>,isAlterIndex=' . intval($isAlterIndex));
+
+	// Shall we add/drop?
+	if (((isInString('ADD', $sql)) || (isInString('DROP', $sql)) || (isInString('CHANGE', $sql))) && ($isAlterIndex === FALSE)) {
+		// Try two columns, one should fix
+		foreach (array(4,5) as $idx) {
+			// If an entry is not set, abort here
+			if (!isset($tableArray[$idx])) {
+				// Debug log this
+				logDebugMessage(__FUNCTION__, __LINE__, 'columnName=' . $columnName . ',idx=' . $idx . ',sql=' . $sql . ' is missing!');
+				break;
+			} // END - if
+
+			// And column name as well
+			$columnName = $tableArray[$idx];
+
+			// Debug log
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'columnName=' . $columnName . ',idx=' . $idx . ',sql=' . $sql . ',hasZeroNums=' . intval(ifSqlTableColumnExists($tableName, $columnName)));
+
+			// Is there no entry on ADD or an entry on DROP/CHANGE?
+			if (((!ifSqlTableColumnExists($tableName, $columnName)) && (isInString('ADD', $sql))) || ((ifSqlTableColumnExists($tableName, $columnName)) && ((isInString('DROP', $sql)) || ((isInString('CHANGE', $sql)) && ($idx == 4) && ((!ifSqlTableColumnExists($tableName, $tableArray[5])) || ($columnName == $tableArray[5])))))) {
+				// Do the query
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Executing: ' . $sql);
+				$result = SQL_QUERY($sql, $F, $L, FALSE);
+
+				// Skip further attempt(s)
+				break;
+			} elseif ((((ifSqlTableColumnExists($tableName, $columnName)) && (isInString('ADD', $sql))) || ((!ifSqlTableColumnExists($tableName, $columnName)) && ((isInString('DROP', $sql))) || (isInString('CHANGE', $sql)))) && ($columnName != 'KEY')) {
+				// Abort here because it is alreay there
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Skipped: sql=' . $sql . ',columnName=' . $columnName . ',idx=' . $idx);
+				break;
+			} elseif ((!ifSqlTableColumnExists($tableName, $columnName)) && (isInString('DROP', $sql))) {
+				// Abort here because we tried to drop a column which is not there (never created maybe)
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'No drop: ' . $sql);
+				break;
+			} elseif ($columnName != 'KEY') {
+				// Something didn't fit, we better log it
+				logDebugMessage(__FUNCTION__, __LINE__, 'Possible problem: ' . $sql . ',hasZeroNums=' . intval(ifSqlTableColumnExists($tableName, $columnName)) . '');
+			}
+		} // END - foreach
+	} elseif ((getTableType() == 'InnoDB') && (isInString('FULLTEXT', $sql))) {
+		// Skip this query silently because InnoDB does not understand fulltext indexes
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, sprintf("Skipped FULLTEXT: sql=%s,tableName=%s,hasZeroNums=%d,file=%s,line=%s", $sql, $tableName, intval((is_bool($result)) ? 0 : ifSqlTableColumnExists($columnName)), $F, $L));
+	} elseif ($isAlterIndex === TRUE) {
+		// And column name as well without backticks
+		$keyName = str_replace('`', '', $tableArray[5]);
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . ',tableArray=<pre>' . print_r($tableArray, TRUE) . '</pre>');
+
+		// Is this "UNIQUE" or so? FULLTEXT has been handled the elseif() block above
+		if (in_array(strtoupper($tableArray[4]), array('INDEX', 'UNIQUE', 'KEY', 'FULLTEXT'))) {
+			// Init loop
+			$begin = 1;
+			$keyName = ',';
+			while (isInString(',', $keyName)) {
+				// Use last
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - BEFORE');
+				$keyName = str_replace('`', '', $tableArray[count($tableArray) - $begin]);
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - BETWEEN');
+
+				// Remove brackes
+				$keyName = str_replace(array('(', ')'), array('', ''), $keyName);
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'keyName=' . $keyName . 'begin=' . $begin . ' - AFTER');
+
+				// Continue
+				$begin++;
+			} // END while
+		} // END - if
+
+		// Shall we run it?
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ', tableArray[3]=' . $tableArray[3] . ',keyName=' . $keyName);
+		if (($tableArray[3] == 'ADD') && (!ifSqlTableIndexExist($tableName, $keyName))) {
+			// Send it to the SQL_QUERY() function to add it
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ' - ADDING!');
+			$result = SQL_QUERY($sql, $F, $L, $enableCodes);
+		} elseif (($tableArray[3] == 'DROP') && (ifSqlTableIndexExist($tableName, $keyName))) {
+			// Send it to the SQL_QUERY() function to drop it
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sql=' . $sql . ' - DROPPING!');
+			$result = SQL_QUERY($sql, $F, $L, $enableCodes);
+		} else {
+			// Not executed
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Not executed: ' . $sql);
+		}
+	} else {
+		// Other ALTER TABLE query
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, $sql);
+		$result = SQL_QUERY($sql, $F, $L, $enableCodes);
+	}
+
+	// Return result
+	return $result;
+}
+
+// Getter for SQL link
+function SQL_GET_LINK () {
+	// Init link
+	$link = NULL;
+
+	// Is it in the globals?
+	if (isset($GLOBALS['sql_link'])) {
+		// Then take it
+		$link = $GLOBALS['sql_link'];
+	} // END - if
+
+	// Return it
+	return $link;
+}
+
+// Setter for link
+function SQL_SET_LINK ($link) {
+	// Is this a resource or null?
+	if ((ifFatalErrorsDetected()) && (isInstallationPhase())) {
+		// This may happen in installation phase
+		return;
+	} elseif ((!is_resource($link)) && (!is_null($link))) {
+		// This should never happen!
+		reportBug(__FUNCTION__, __LINE__, sprintf("Type of link is not resource or null, type=%s", gettype($link)));
+	} // END - if
+
+	// Set it
+	$GLOBALS['sql_link'] = $link;
+
+	// Re-init cache
+	$GLOBALS['is_sql_link_up'] = is_resource($link);
+}
+
+// Checks if the link is up
+function SQL_IS_LINK_UP () {
+	// Is there cached this?
+	if (!isset($GLOBALS['is_sql_link_up'])) {
+		// Determine it
+		$GLOBALS['is_sql_link_up'] = is_resource(SQL_GET_LINK());
+	} // END - if
+
+	// Return the result
+	return $GLOBALS['is_sql_link_up'];
+}
+
+// Wrapper function to make code more readable
+function SQL_HASZERONUMS ($result) {
+	// Just pass it through
+	return (SQL_NUMROWS($result) === 0);
+}
+
+// Wrapper function to make code more readable
+function SQL_HASZEROAFFECTED () {
+	// Just pass it through
+	return (SQL_AFFECTEDROWS() === 0);
+}
+
+// Private function to prepare the SQL query string
+function SQL_PREPARE_SQL_STRING ($sqlString, $enableCodes = TRUE) {
+	// Debug message
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ',enableCodes=' . intval($enableCodes) . ' - ENTERED!');
+
+	// Is it already cached?
+	if (!isset($GLOBALS['sql_strings']['' . $sqlString . ''])) {
+		// Preserve escaping and compile URI codes+config+expression code
+		$sqlString2 = FILTER_COMPILE_EXPRESSION_CODE(FILTER_COMPILE_CONFIG($sqlString));
+
+		// Debug message
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString2=' . $sqlString2);
+
+		// Do final compilation and revert {ESCAPE}
+		$GLOBALS['sql_strings']['' . $sqlString . ''] = doFinalCompilation($sqlString2, FALSE, $enableCodes);
+	} else {
+		// Log message
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ' - CACHE!');
+	}
+
+	// Debug message
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'sqlString=' . $sqlString . ',enableCodes=' . intval($enableCodes) . ',sql_strings=' . $GLOBALS['sql_strings']['' . $sqlString . ''] . ' - EXIT!');
+
+	// Return it
+	return $GLOBALS['sql_strings']['' . $sqlString . ''];
+}
+
+// Creates a MySQL TIMESTAMP compatible string from given Uni* timestamp
+function SQL_EPOCHE_TO_TIMESTAMP ($timestamp) {
+	return generateDateTime($timestamp, 7);
+}
+
+// Check if there is a SQL table created
+function ifSqlTableExists ($tableName) {
+	// Make sure double-prefixes are being removed
+	$tableName = str_replace('{?_MYSQL_PREFIX?}_', '', $tableName);
+
+	// Log message
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ' - ENTERED!');
+
+	// Is there cache?
+	if (!isset($GLOBALS[__FUNCTION__][$tableName])) {
+		// Check if the table is there
+		$result = SQL_QUERY_ESC("SHOW TABLES FROM `{?__DB_NAME?}` WHERE `Tables_in_{?__DB_NAME?}`='{?_MYSQL_PREFIX?}_%s'",
+			array($tableName), __FILE__, __LINE__);
+
+		// Is a link there?
+		if (!is_resource($result)) {
+			// Is installation phase?
+			if (isInstallationPhase()) {
+				// Then silently abort here
+				//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ' - Returning FALSE ...');
+				return FALSE;
+			} else {
+				// Please report this
+				reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
+			}
+		} // END - if
+
+		// Is there an entry?
+		$GLOBALS[__FUNCTION__][$tableName] = (SQL_NUMROWS($result) == 1);
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',numRows=' . intval($GLOBALS[__FUNCTION__][$tableName]));
+	} // END - if
+
+	// Return cache
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',result=' . intval($GLOBALS[__FUNCTION__][$tableName]) . ' - EXIT!');
+	return $GLOBALS[__FUNCTION__][$tableName];
+}
+
+// Is a table column there?
+function ifSqlTableColumnExists ($tableName, $columnName, $forceFound = FALSE) {
+	// Remove back-ticks
+	$columnName = str_replace('`', '', $columnName);
+
+	// Debug message
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',columnName=' . $columnName . ' - ENTERED!');
+
+	// If the table is not there, it is okay
+	if (!ifSqlTableExists($tableName)) {
+		// Then abort here
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Table ' . $tableName . ' does not exist, columnName=' . $columnName . ',forceFound=' . intval($forceFound));
+		return (($forceFound === FALSE) && (isInstallationPhase()));
+	} // END - if
+
+	// Get column information
+	$result = SQL_QUERY_ESC("SHOW COLUMNS FROM `%s` LIKE '%s'",
+		array(
+			$tableName,
+			$columnName
+		), __FUNCTION__, __LINE__);
+
+	// Is a link there?
+	if (!is_resource($result)) {
+		// Is installation phase?
+		if (isInstallationPhase()) {
+			// Then silently abort here
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ',columnName=' . $columnName . ' - Returning FALSE ...');
+			return $forceFound;
+		} else {
+			// Please report this
+			reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
+		}
+	} // END - if
+
+	// Determine it
+	$doesExist = (!SQL_HASZERONUMS($result));
+
+	// Free result
+	SQL_FREERESULT($result);
+
+	// Return cache
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',columnName=' . $columnName . ',doesExist=' . intval($doesExist) . ' - EXIT!');
+	return $doesExist;
+}
+
+// Checks depending on the mode if the index is there
+function ifSqlTableIndexExist ($tableName, $keyName, $forceFound = FALSE) {
+	// Remove back-ticks
+	$keyName = str_replace('`', '', $keyName);
+
+	// Debug message
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',keyName=' . $keyName . ' - ENTERED!');
+
+	// If the table is not there, it is okay
+	if (!ifSqlTableExists($tableName)) {
+		// Then abort here
+		//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'Table ' . $tableName . ' does not exist, keyName=' . $keyName . ',forceFound=' . intval($forceFound));
+		return (($forceFound === FALSE) && (isInstallationPhase()));
+	} // END - if
+
+	// Show indexes
+	$result = SQL_QUERY_ESC("SHOW INDEX FROM `%s`", array($tableName), __FUNCTION__, __LINE__);
+
+	// Is a link there?
+	if (!is_resource($result)) {
+		// Is installation phase?
+		if (isInstallationPhase()) {
+			// Then silently abort here
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ',isLinkUp=' . intval(SQL_IS_LINK_UP()) . ',tableName=' . $tableName . ',keyName=' . $keyName . ' - Returning FALSE ...');
+			return $forceFound;
+		} else {
+			// Please report this
+			reportBug(__FUNCTION__, __LINE__, 'result[]=' . gettype($result) . ' is not a resource.');
+		}
+	} // END - if
+
+	// The key is not found by default
+	$doesExist = FALSE;
+
+	// Walk through all
+	while ($content = SQL_FETCHARRAY($result)) {
+		// Is it the requested one?
+		if ($content['Key_name'] == $keyName) {
+			// Then it is found and exit
+			$doesExist = TRUE;
+			break;
+		} // END - if
+	} // END - while
+
+	// Free result
+	SQL_FREERESULT($result);
+
+	// Return cache
+	//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'tableName=' . $tableName . ',keyName=' . $keyName . ',doesExist=' . intval($doesExist) . ' - EXIT!');
+	return $doesExist;
+}
+
+// Init database layer
+function initDatabaseLayer () {
+	// Set all required variables:
+	$GLOBALS['last_sql_error'] = '';
+}
+
+// Get last SQL error
+function getLastSqlError () {
+	return $GLOBALS['last_sql_error'];
+}
+
+// Gets an array (or false if none is found) from all supported engines
+function getArrayFromSupportedSqlEngines ($requestedEngine = 'ALL') {
+	// Init array
+	$engines = array();
+
+	// This also worked, now we need to check if the selected database type is supported
+	$result = SQL_QUERY('SHOW ENGINES', __FUNCTION__, __LINE__);
+
+	// Are there entries? (Bad if not)
+	if (!SQL_HASZERONUMS($result)) {
+		// Load all and check for active entries
+		while ($content = SQL_FETCHARRAY($result)) {
+			// Debug message
+			//* DEBUG: */ logDebugMessage(__FUNCTION__, __LINE__, 'support=' . $requestedEngine . ',Engine=' . $content['Engine'] . ',Support=' . $content['Support']);
+
+			// Is this supported?
+			if ((($requestedEngine == 'ALL') || ($content['Engine'] == $requestedEngine)) && (in_array($content['Support'], array('YES', 'DEFAULT')))) {
+				// Add it
+				array_push($engines, $content);
+			} elseif (isDebugModeEnabled()) {
+				// Log it away in debug mode
+				logDebugMessage(__FUNCTION__, __LINE__, 'Engine ' . $content['Engine'] . ' is not supported (' . $content['Supported'] . ' - ' . $requestedEngine . ')');
+			}
+		} // END - if
+	} else {
+		// No engines! :(
+		$engines = FALSE;
+	}
+
+	// Free result
+	SQL_FREERESULT($result);
+
+	// Return result
+	return $engines;
+}
+
 // [EOF]
 ?>
-- 
2.39.5