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 string $sql
  33          * @return resource False on error
  34          */
  35         protected function doQuery( $sql ) {
  36                 $conn = $this->getBindingHandle();
  37
  38                 if ( $this->bufferResults() ) {
  39                         $ret = mysql_query( $sql, $conn );
  40                 } else {
  41                         $ret = mysql_unbuffered_query( $sql, $conn );
  42                 }
  43
  44                 return $ret;
  45         }
  46
  47         /**
  48          * @param string $realServer
  49          * @return bool|resource MySQL Database connection or false on failure to connect
  50          * @throws DBConnectionError
  51          */
  52         protected function mysqlConnect( $realServer ) {
  53                 # Avoid a suppressed fatal error, which is very hard to track down
  54                 if ( !extension_loaded( 'mysql' ) ) {
  55                         throw new DBConnectionError(
  56                                 $this,
  57                                 "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n"
  58                         );
  59                 }
  60
  61                 $connFlags = 0;
  62                 if ( $this->mFlags & DBO_SSL ) {
  63                         $connFlags |= MYSQL_CLIENT_SSL;
  64                 }
  65                 if ( $this->mFlags & DBO_COMPRESS ) {
  66                         $connFlags |= MYSQL_CLIENT_COMPRESS;
  67                 }
  68
  69                 if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
  70                         $numAttempts = 2;
  71                 } else {
  72                         $numAttempts = 1;
  73                 }
  74
  75                 $conn = false;
  76
  77                 for ( $i = 0; $i < $numAttempts && !$conn; $i++ ) {
  78                         if ( $i > 1 ) {
  79                                 usleep( 1000 );
  80                         }
  81                         if ( $this->mFlags & DBO_PERSISTENT ) {
  82                                 $conn = mysql_pconnect( $realServer, $this->mUser, $this->mPassword, $connFlags );
  83                         } else {
  84                                 # Create a new connection...
  85                                 $conn = mysql_connect( $realServer, $this->mUser, $this->mPassword, true, $connFlags );
  86                         }
  87                 }
  88
  89                 return $conn;
  90         }
  91
  92         /**
  93          * @param string $charset
  94          * @return bool
  95          */
  96         protected function mysqlSetCharset( $charset ) {
  97                 $conn = $this->getBindingHandle();
  98
  99                 if ( function_exists( 'mysql_set_charset' ) ) {
 100                         return mysql_set_charset( $charset, $conn );
 101                 } else {
 102                         return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
 103                 }
 104         }
 105
 106         /**
 107          * @return bool
 108          */
 109         protected function closeConnection() {
 110                 $conn = $this->getBindingHandle();
 111
 112                 return mysql_close( $conn );
 113         }
 114
 115         /**
 116          * @return int
 117          */
 118         function insertId() {
 119                 $conn = $this->getBindingHandle();
 120
 121                 return mysql_insert_id( $conn );
 122         }
 123
 124         /**
 125          * @return int
 126          */
 127         function lastErrno() {
 128                 if ( $this->mConn ) {
 129                         return mysql_errno( $this->mConn );
 130                 } else {
 131                         return mysql_errno();
 132                 }
 133         }
 134
 135         /**
 136          * @return int
 137          */
 138         function affectedRows() {
 139                 $conn = $this->getBindingHandle();
 140
 141                 return mysql_affected_rows( $conn );
 142         }
 143
 144         /**
 145          * @param string $db
 146          * @return bool
 147          */
 148         function selectDB( $db ) {
 149                 $conn = $this->getBindingHandle();
 150
 151                 $this->mDBname = $db;
 152
 153                 return mysql_select_db( $db, $conn );
 154         }
 155
 156         protected function mysqlFreeResult( $res ) {
 157                 return mysql_free_result( $res );
 158         }
 159
 160         protected function mysqlFetchObject( $res ) {
 161                 return mysql_fetch_object( $res );
 162         }
 163
 164         protected function mysqlFetchArray( $res ) {
 165                 return mysql_fetch_array( $res );
 166         }
 167
 168         protected function mysqlNumRows( $res ) {
 169                 return mysql_num_rows( $res );
 170         }
 171
 172         protected function mysqlNumFields( $res ) {
 173                 return mysql_num_fields( $res );
 174         }
 175
 176         protected function mysqlFetchField( $res, $n ) {
 177                 return mysql_fetch_field( $res, $n );
 178         }
 179
 180         protected function mysqlFieldName( $res, $n ) {
 181                 return mysql_field_name( $res, $n );
 182         }
 183
 184         protected function mysqlFieldType( $res, $n ) {
 185                 return mysql_field_type( $res, $n );
 186         }
 187
 188         protected function mysqlDataSeek( $res, $row ) {
 189                 return mysql_data_seek( $res, $row );
 190         }
 191
 192         protected function mysqlError( $conn = null ) {
 193                 return ( $conn !== null ) ? mysql_error( $conn ) : mysql_error(); // avoid warning
 194         }
 195
 196         protected function mysqlRealEscapeString( $s ) {
 197                 $conn = $this->getBindingHandle();
 198
 199                 return mysql_real_escape_string( $s, $conn );
 200         }
 201
 202         protected function mysqlPing() {
 203                 $conn = $this->getBindingHandle();
 204
 205                 return mysql_ping( $conn );
 206         }
 207 }