includes/db/DatabaseMysql.php

   1 <?php
   2 /**
   3  * This is the MySQL database abstraction layer.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Database
  22  */
  23
  24 /**
  25  * Database abstraction object for PHP extension mysql.
  26  *
  27  * @ingroup Database
  28  * @see Database
  29  */
  30 class DatabaseMysql extends DatabaseMysqlBase {
  31
  32         /**
  33          * @param $sql string
  34          * @return resource
  35          */
  36         protected function doQuery( $sql ) {
  37                 if ( $this->bufferResults() ) {
  38                         $ret = mysql_query( $sql, $this->mConn );
  39                 } else {
  40                         $ret = mysql_unbuffered_query( $sql, $this->mConn );
  41                 }
  42                 return $ret;
  43         }
  44
  45         protected function mysqlConnect( $realServer ) {
  46                 # Fail now
  47                 # Otherwise we get a suppressed fatal error, which is very hard to track down
  48                 if ( !extension_loaded( 'mysql' ) ) {
  49                         throw new DBConnectionError( $this, "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
  50                 }
  51
  52                 $connFlags = 0;
  53                 if ( $this->mFlags & DBO_SSL ) {
  54                         $connFlags |= MYSQL_CLIENT_SSL;
  55                 }
  56                 if ( $this->mFlags & DBO_COMPRESS ) {
  57                         $connFlags |= MYSQL_CLIENT_COMPRESS;
  58                 }
  59
  60                 if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
  61                         $numAttempts = 2;
  62                 } else {
  63                         $numAttempts = 1;
  64                 }
  65
  66                 $conn = false;
  67
  68                 for ( $i = 0; $i < $numAttempts && !$conn; $i++ ) {
  69                         if ( $i > 1 ) {
  70                                 usleep( 1000 );
  71                         }
  72                         if ( $this->mFlags & DBO_PERSISTENT ) {
  73                                 $conn = mysql_pconnect( $realServer, $this->mUser, $this->mPassword, $connFlags );
  74                         } else {
  75                                 # Create a new connection...
  76                                 $conn = mysql_connect( $realServer, $this->mUser, $this->mPassword, true, $connFlags );
  77                         }
  78                 }
  79
  80                 return $conn;
  81         }
  82
  83         /**
  84          * @return bool
  85          */
  86         protected function mysqlSetCharset( $charset ) {
  87                 if ( function_exists( 'mysql_set_charset' ) ) {
  88                         return mysql_set_charset( $charset, $this->mConn );
  89                 } else {
  90                         return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
  91                 }
  92         }
  93
  94         /**
  95          * @return bool
  96          */
  97         protected function closeConnection() {
  98                 return mysql_close( $this->mConn );
  99         }
 100
 101         /**
 102          * @return int
 103          */
 104         function insertId() {
 105                 return mysql_insert_id( $this->mConn );
 106         }
 107
 108         /**
 109          * @return int
 110          */
 111         function lastErrno() {
 112                 if ( $this->mConn ) {
 113                         return mysql_errno( $this->mConn );
 114                 } else {
 115                         return mysql_errno();
 116                 }
 117         }
 118
 119         /**
 120          * @return int
 121          */
 122         function affectedRows() {
 123                 return mysql_affected_rows( $this->mConn );
 124         }
 125
 126         /**
 127          * @param $db
 128          * @return bool
 129          */
 130         function selectDB( $db ) {
 131                 $this->mDBname = $db;
 132                 return mysql_select_db( $db, $this->mConn );
 133         }
 134
 135         /**
 136          * @return string
 137          */
 138         function getServerVersion() {
 139                 return mysql_get_server_info( $this->mConn );
 140         }
 141
 142         protected function mysqlFreeResult( $res ) {
 143                 return mysql_free_result( $res );
 144         }
 145
 146         protected function mysqlFetchObject( $res ) {
 147                 return mysql_fetch_object( $res );
 148         }
 149
 150         protected function mysqlFetchArray( $res ) {
 151                 return mysql_fetch_array( $res );
 152         }
 153
 154         protected function mysqlNumRows( $res ) {
 155                 return mysql_num_rows( $res );
 156         }
 157
 158         protected function mysqlNumFields( $res ) {
 159                 return mysql_num_fields( $res );
 160         }
 161
 162         protected function mysqlFetchField( $res, $n ) {
 163                 return mysql_fetch_field( $res, $n );
 164         }
 165
 166         protected function mysqlFieldName( $res, $n ) {
 167                 return mysql_field_name( $res, $n );
 168         }
 169
 170         protected function mysqlDataSeek( $res, $row ) {
 171                 return mysql_data_seek( $res, $row );
 172         }
 173
 174         protected function mysqlError( $conn = null ) {
 175                 return ( $conn !== null ) ? mysql_error( $conn ) : mysql_error(); // avoid warning
 176         }
 177
 178         protected function mysqlRealEscapeString( $s ) {
 179                 return mysql_real_escape_string( $s, $this->mConn );
 180         }
 181
 182         protected function mysqlPing() {
 183                 return mysql_ping( $this->mConn );
 184         }
 185 }