<?php
-// MySQL database class
-//
-// For debugging, insert 'dbg(x);' anywhere in the program flow.
-// x = 1: display db success/failure following content
-// x = 2: display full queries following content
-// x = 3: display full queries using echo; which will mess up display
-// really bad but will return output in stubborn cases.
+/**
+ *
+ * MySQL database class
+ *
+ * For debugging, insert 'dbg(1);' anywhere in the program flow.
+ * dbg(0); will turn it off. Logging is performed at LOGGER_DATA level.
+ * When logging, all binary info is converted to text and html entities are escaped so that
+ * the debugging stream is safe to view within both terminals and web pages.
+ *
+ */
if(! class_exists('dba')) {
class dba {
private $debug = 0;
private $db;
+ public $connected = false;
function __construct($server,$user,$pass,$db,$install = false) {
+
+ $server = trim($server);
+ $user = trim($user);
+ $pass = trim($pass);
+ $db = trim($db);
+
+ if($install) {
+ if(strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) {
+ if(! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
+ notice( sprintf( t('Cannot locate DNS info for database server \'%s\''), $server));
+ $this->connected = false;
+ $this->db = null;
+ return;
+ }
+ }
+ }
+
$this->db = @new mysqli($server,$user,$pass,$db);
- if((mysqli_connect_errno()) && (! $install))
- system_unavailable();
+ if(! mysqli_connect_errno()) {
+ $this->connected = true;
+ }
+ else {
+ $this->db = null;
+ if(! $install)
+ system_unavailable();
+ }
}
public function getdb() {
}
public function q($sql) {
- global $debug_text;
- if(! $this->db )
+ if((! $this->db) || (! $this->connected))
return false;
$result = @$this->db->query($sql);
elseif($result === true)
$mesg = 'true';
else
- $mesg = $result->num_rows.' results' . EOL;
+ $mesg = $result->num_rows . ' results' . EOL;
$str = 'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg . EOL;
logger('dba: ' . $str );
}
else {
+
+ /**
+ * If dbfail.out exists, we will write any failed calls directly to it,
+ * regardless of any logging that may or may nor be in effect.
+ * These usually indicate SQL syntax errors that need to be resolved.
+ */
+
if($result === false) {
logger('dba: ' . printable($sql) . ' returned false.');
if(file_exists('dbfail.out'))
}
public function escape($str) {
- return @$this->db->real_escape_string($str);
+ if($this->db && $this->connected)
+ return @$this->db->real_escape_string($str);
}
function __destruct() {
if(! function_exists('dbg')) {
function dbg($state) {
global $db;
+ if($db)
$db->dbg($state);
}}
if(! function_exists('dbesc')) {
function dbesc($str) {
global $db;
- return($db->escape($str));
+ if($db && $db->connected)
+ return($db->escape($str));
+ else
+ return(str_replace("'","\\'",$str));
}}
global $db;
$args = func_get_args();
unset($args[0]);
- $ret = $db->q(vsprintf($sql,$args));
- return $ret;
+
+ if($db && $db->connected) {
+ $ret = $db->q(vsprintf($sql,$args));
+ return $ret;
+ }
+
+ /**
+ *
+ * This will happen occasionally trying to store the
+ * session data after abnormal program termination
+ *
+ */
+
+ logger('dba: no database: ' . print_r($args,true));
+ return false;
+
}}
-// raw db query, no arguments
+/**
+ *
+ * Raw db query, no arguments
+ *
+ */
if(! function_exists('dbq')) {
function dbq($sql) {
global $db;
- $ret = $db->q($sql);
+ if($db && $db->connected)
+ $ret = $db->q($sql);
+ else
+ $ret = false;
return $ret;
}}
if(is_array($arr) && count($arr)) {
array_walk($arr,'dbesc_array_cb');
}
-}}
\ No newline at end of file
+}}
+
+