includes/libs/rdbms/database/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 namespace Wikimedia\Rdbms;
  24
  25 /**
  26  * Database abstraction object for PHP extension mysql.
  27  *
  28  * @deprecated 1.30 PHP extension 'mysql' was deprecated in PHP 5.5 and removed in PHP 7.0.
  29  * @see PHP extension 'mysqli' and DatabaseMysqli
  30  *
  31  * @ingroup Database
  32  * @see Database
  33  */
  34 class DatabaseMysql extends DatabaseMysqlBase {
  35         /**
  36          * @param string $sql
  37          * @return resource False on error
  38          */
  39         protected function doQuery( $sql ) {
  40                 $conn = $this->getBindingHandle();
  41
  42                 if ( $this->bufferResults() ) {
  43                         $ret = mysql_query( $sql, $conn );
  44                 } else {
  45                         $ret = mysql_unbuffered_query( $sql, $conn );
  46                 }
  47
  48                 return $ret;
  49         }
  50
  51         /**
  52          * @param string $realServer
  53          * @return bool|resource MySQL Database connection or false on failure to connect
  54          * @throws DBConnectionError
  55          */
  56         protected function mysqlConnect( $realServer ) {
  57                 # Avoid a suppressed fatal error, which is very hard to track down
  58                 if ( !extension_loaded( 'mysql' ) ) {
  59                         throw new DBConnectionError(
  60                                 $this,
  61                                 "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n"
  62                         );
  63                 }
  64
  65                 $connFlags = 0;
  66                 if ( $this->mFlags & self::DBO_SSL ) {
  67                         $connFlags |= MYSQL_CLIENT_SSL;
  68                 }
  69                 if ( $this->mFlags & self::DBO_COMPRESS ) {
  70                         $connFlags |= MYSQL_CLIENT_COMPRESS;
  71                 }
  72
  73                 if ( ini_get( 'mysql.connect_timeout' ) <= 3 ) {
  74                         $numAttempts = 2;
  75                 } else {
  76                         $numAttempts = 1;
  77                 }
  78
  79                 $conn = false;
  80
  81                 # The kernel's default SYN retransmission period is far too slow for us,
  82                 # so we use a short timeout plus a manual retry. Retrying means that a small
  83                 # but finite rate of SYN packet loss won't cause user-visible errors.
  84                 for ( $i = 0; $i < $numAttempts && !$conn; $i++ ) {
  85                         if ( $i > 1 ) {
  86                                 usleep( 1000 );
  87                         }
  88                         if ( $this->mFlags & self::DBO_PERSISTENT ) {
  89                                 $conn = mysql_pconnect( $realServer, $this->mUser, $this->mPassword, $connFlags );
  90                         } else {
  91                                 # Create a new connection...
  92                                 $conn = mysql_connect( $realServer, $this->mUser, $this->mPassword, true, $connFlags );
  93                         }
  94                 }
  95
  96                 return $conn;
  97         }
  98
  99         /**
 100          * @param string $charset
 101          * @return bool
 102          */
 103         protected function mysqlSetCharset( $charset ) {
 104                 $conn = $this->getBindingHandle();
 105
 106                 if ( function_exists( 'mysql_set_charset' ) ) {
 107                         return mysql_set_charset( $charset, $conn );
 108                 } else {
 109                         return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
 110                 }
 111         }
 112
 113         /**
 114          * @return bool
 115          */
 116         protected function closeConnection() {
 117                 $conn = $this->getBindingHandle();
 118
 119                 return mysql_close( $conn );
 120         }
 121
 122         /**
 123          * @return int
 124          */
 125         function insertId() {
 126                 $conn = $this->getBindingHandle();
 127
 128                 return mysql_insert_id( $conn );
 129         }
 130
 131         /**
 132          * @return int
 133          */
 134         function lastErrno() {
 135                 if ( $this->mConn ) {
 136                         return mysql_errno( $this->mConn );
 137                 } else {
 138                         return mysql_errno();
 139                 }
 140         }
 141
 142         /**
 143          * @return int
 144          */
 145         function affectedRows() {
 146                 $conn = $this->getBindingHandle();
 147
 148                 return mysql_affected_rows( $conn );
 149         }
 150
 151         /**
 152          * @param string $db
 153          * @return bool
 154          */
 155         function selectDB( $db ) {
 156                 $conn = $this->getBindingHandle();
 157
 158                 $this->mDBname = $db;
 159
 160                 return mysql_select_db( $db, $conn );
 161         }
 162
 163         protected function mysqlFreeResult( $res ) {
 164                 return mysql_free_result( $res );
 165         }
 166
 167         protected function mysqlFetchObject( $res ) {
 168                 return mysql_fetch_object( $res );
 169         }
 170
 171         protected function mysqlFetchArray( $res ) {
 172                 return mysql_fetch_array( $res );
 173         }
 174
 175         protected function mysqlNumRows( $res ) {
 176                 return mysql_num_rows( $res );
 177         }
 178
 179         protected function mysqlNumFields( $res ) {
 180                 return mysql_num_fields( $res );
 181         }
 182
 183         protected function mysqlFetchField( $res, $n ) {
 184                 return mysql_fetch_field( $res, $n );
 185         }
 186
 187         protected function mysqlFieldName( $res, $n ) {
 188                 return mysql_field_name( $res, $n );
 189         }
 190
 191         protected function mysqlFieldType( $res, $n ) {
 192                 return mysql_field_type( $res, $n );
 193         }
 194
 195         protected function mysqlDataSeek( $res, $row ) {
 196                 return mysql_data_seek( $res, $row );
 197         }
 198
 199         protected function mysqlError( $conn = null ) {
 200                 return ( $conn !== null ) ? mysql_error( $conn ) : mysql_error(); // avoid warning
 201         }
 202
 203         protected function mysqlRealEscapeString( $s ) {
 204                 $conn = $this->getBindingHandle();
 205
 206                 return mysql_real_escape_string( $s, $conn );
 207         }
 208 }
 209
 210 class_alias( DatabaseMysql::class, 'DatabaseMysql' );