<?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() {
+ return $this->db;
}
public function q($sql) {
- global $debug_text;
- if(! $this->db )
+ if((! $this->db) || (! $this->connected))
return false;
$result = @$this->db->query($sql);
$mesg = '';
- if($this->db->mysqli->errno)
- $debug_text .= $this->db->mysqli->error . EOL;
+ if($this->db->errno)
+ logger('dba: ' . $this->db->error);
if($result === false)
$mesg = 'false';
elseif($result === true)
$mesg = 'true';
else
- $mesg = $result->num_rows.' results' . EOL;
+ $mesg = $result->num_rows . ' results' . EOL;
- $str = 'SQL = ' . $sql . EOL . 'SQL returned ' . $mesg . EOL;
-
- switch($this->debug) {
- case 3:
- echo $str;
- break;
- default:
- $debug_text .= $str;
- break;
+ $str = 'SQL = ' . printable($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($sql) . ' returned false.');
+ if(file_exists('dbfail.out'))
+ file_put_contents('dbfail.out', printable($sql) . ' returned false' . "\n", FILE_APPEND);
}
}
$result->free_result();
}
- if($this->debug == 2)
- $debug_text .= print_r($r, true). EOL;
-// $debug_text .= quoted_printable_encode(print_r($r, true). EOL);
- elseif($this->debug == 3)
- echo print_r($r, true) . EOL ;
-// echo quoted_printable_encode(print_r($r, true) . EOL) ;
-
+ if($this->debug)
+ logger('dba: ' . printable(print_r($r, true)), LOGGER_DATA);
return($r);
}
}
public function escape($str) {
- return @$this->db->real_escape_string($str);
+ if($this->db && $this->connected)
+ return @$this->db->real_escape_string($str);
}
function __destruct() {
}
}}
+if(! function_exists('printable')) {
+function printable($s) {
+ $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
+ $s = str_replace("\x00",'.',$s);
+ if(x($_SERVER,'SERVER_NAME'))
+ $s = escape_tags($s);
+ return $s;
+}}
+
// Procedural functions
if(! function_exists('dbg')) {
function dbg($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,$args));
+
+ if($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
+ *
+ */
+
+if(! function_exists('dbq')) {
+function dbq($sql) {
+
+ global $db;
+ if($db && $db->connected)
+ $ret = $db->q($sql);
+ else
+ $ret = false;
return $ret;
}}