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          * @param $sql string
  33          * @return resource
  34          */
  35         protected function doQuery( $sql ) {
  36                 if ( $this->bufferResults() ) {
  37                         $ret = mysql_query( $sql, $this->mConn );
  38                 } else {
  39                         $ret = mysql_unbuffered_query( $sql, $this->mConn );
  40                 }
  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(
  50                                 $this,
  51                                 "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n"
  52                         );
  53                 }
  54
  55                 $connFlags = 0;
  56                 if ( $this->mFlags & DBO_SSL ) {
  57                         $connFlags |= MYSQL_CLIENT_SSL;
  58                 }
  59                 if ( $this->mFlags & DBO_COMPRESS ) {
  60                         $connFlags |= MYSQL_CLIENT_COMPRESS;
  61                 }
  62
  63                 if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
  64                         $numAttempts = 2;
  65                 } else {
  66                         $numAttempts = 1;
  67                 }
  68
  69                 $conn = false;
  70
  71                 for ( $i = 0; $i < $numAttempts && !$conn; $i++ ) {
  72                         if ( $i > 1 ) {
  73                                 usleep( 1000 );
  74                         }
  75                         if ( $this->mFlags & DBO_PERSISTENT ) {
  76                                 $conn = mysql_pconnect( $realServer, $this->mUser, $this->mPassword, $connFlags );
  77                         } else {
  78                                 # Create a new connection...
  79                                 $conn = mysql_connect( $realServer, $this->mUser, $this->mPassword, true, $connFlags );
  80                         }
  81                 }
  82
  83                 return $conn;
  84         }
  85
  86         /**
  87          * @return bool
  88          */
  89         protected function mysqlSetCharset( $charset ) {
  90                 if ( function_exists( 'mysql_set_charset' ) ) {
  91                         return mysql_set_charset( $charset, $this->mConn );
  92                 } else {
  93                         return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
  94                 }
  95         }
  96
  97         /**
  98          * @return bool
  99          */
 100         protected function closeConnection() {
 101                 return mysql_close( $this->mConn );
 102         }
 103
 104         /**
 105          * @return int
 106          */
 107         function insertId() {
 108                 return mysql_insert_id( $this->mConn );
 109         }
 110
 111         /**
 112          * @return int
 113          */
 114         function lastErrno() {
 115                 if ( $this->mConn ) {
 116                         return mysql_errno( $this->mConn );
 117                 } else {
 118                         return mysql_errno();
 119                 }
 120         }
 121
 122         /**
 123          * @return int
 124          */
 125         function affectedRows() {
 126                 return mysql_affected_rows( $this->mConn );
 127         }
 128
 129         /**
 130          * @param $db
 131          * @return bool
 132          */
 133         function selectDB( $db ) {
 134                 $this->mDBname = $db;
 135
 136                 return mysql_select_db( $db, $this->mConn );
 137         }
 138
 139         /**
 140          * @return string
 141          */
 142         function getServerVersion() {
 143                 return mysql_get_server_info( $this->mConn );
 144         }
 145
 146         protected function mysqlFreeResult( $res ) {
 147                 return mysql_free_result( $res );
 148         }
 149
 150         protected function mysqlFetchObject( $res ) {
 151                 return mysql_fetch_object( $res );
 152         }
 153
 154         protected function mysqlFetchArray( $res ) {
 155                 return mysql_fetch_array( $res );
 156         }
 157
 158         protected function mysqlNumRows( $res ) {
 159                 return mysql_num_rows( $res );
 160         }
 161
 162         protected function mysqlNumFields( $res ) {
 163                 return mysql_num_fields( $res );
 164         }
 165
 166         protected function mysqlFetchField( $res, $n ) {
 167                 return mysql_fetch_field( $res, $n );
 168         }
 169
 170         protected function mysqlFieldName( $res, $n ) {
 171                 return mysql_field_name( $res, $n );
 172         }
 173
 174         protected function mysqlFieldType( $res, $n ) {
 175                 return mysql_field_type( $res, $n );
 176         }
 177
 178         protected function mysqlDataSeek( $res, $row ) {
 179                 return mysql_data_seek( $res, $row );
 180         }
 181
 182         protected function mysqlError( $conn = null ) {
 183                 return ( $conn !== null ) ? mysql_error( $conn ) : mysql_error(); // avoid warning
 184         }
 185
 186         protected function mysqlRealEscapeString( $s ) {
 187                 return mysql_real_escape_string( $s, $this->mConn );
 188         }
 189
 190         protected function mysqlPing() {
 191                 return mysql_ping( $this->mConn );
 192         }
 193 }