includes/db/DatabaseMysqli.php

   1 <?php
   2 /**
   3  * This is the MySQLi 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 mysqli.
  26  *
  27  * @ingroup Database
  28  * @since 1.22
  29  * @see Database
  30  */
  31 class DatabaseMysqli extends DatabaseMysqlBase {
  32         /**
  33          * @param string $sql
  34          * @return resource
  35          */
  36         protected function doQuery( $sql ) {
  37                 if ( $this->bufferResults() ) {
  38                         $ret = $this->mConn->query( $sql );
  39                 } else {
  40                         $ret = $this->mConn->query( $sql, MYSQLI_USE_RESULT );
  41                 }
  42
  43                 return $ret;
  44         }
  45
  46         /**
  47          * @param string $realServer
  48          * @return bool|mysqli
  49          * @throws DBConnectionError
  50          */
  51         protected function mysqlConnect( $realServer ) {
  52                 global $wgDBmysql5;
  53                 # Fail now
  54                 # Otherwise we get a suppressed fatal error, which is very hard to track down
  55                 if ( !function_exists( 'mysqli_init' ) ) {
  56                         throw new DBConnectionError( $this, "MySQLi functions missing,"
  57                                 . " have you compiled PHP with the --with-mysqli option?\n" );
  58                 }
  59
  60                 // Other than mysql_connect, mysqli_real_connect expects an explicit port
  61                 // and socket parameters. So we need to parse the port and socket out of
  62                 // $realServer
  63                 $port = null;
  64                 $socket = null;
  65                 $hostAndPort = IP::splitHostAndPort( $realServer );
  66                 if ( $hostAndPort ) {
  67                         $realServer = $hostAndPort[0];
  68                         if ( $hostAndPort[1] ) {
  69                                 $port = $hostAndPort[1];
  70                         }
  71                 } elseif ( substr_count( $realServer, ':' ) == 1 ) {
  72                         // If we have a colon and something that's not a port number
  73                         // inside the hostname, assume it's the socket location
  74                         $hostAndSocket = explode( ':', $realServer );
  75                         $realServer = $hostAndSocket[0];
  76                         $socket = $hostAndSocket[1];
  77                 }
  78
  79                 $connFlags = 0;
  80                 if ( $this->mFlags & DBO_SSL ) {
  81                         $connFlags |= MYSQLI_CLIENT_SSL;
  82                 }
  83                 if ( $this->mFlags & DBO_COMPRESS ) {
  84                         $connFlags |= MYSQLI_CLIENT_COMPRESS;
  85                 }
  86                 if ( $this->mFlags & DBO_PERSISTENT ) {
  87                         $realServer = 'p:' . $realServer;
  88                 }
  89
  90                 $mysqli = mysqli_init();
  91                 if ( $wgDBmysql5 ) {
  92                         // Tell the server we're communicating with it in UTF-8.
  93                         // This may engage various charset conversions.
  94                         $mysqli->options( MYSQLI_SET_CHARSET_NAME, 'utf8' );
  95                 } else {
  96                         $mysqli->options( MYSQLI_SET_CHARSET_NAME, 'binary' );
  97                 }
  98                 $mysqli->options( MYSQLI_OPT_CONNECT_TIMEOUT, 3 );
  99
 100                 if ( $mysqli->real_connect( $realServer, $this->mUser,
 101                         $this->mPassword, $this->mDBname, $port, $socket, $connFlags )
 102                 ) {
 103                         return $mysqli;
 104                 }
 105
 106                 return false;
 107         }
 108
 109         protected function connectInitCharset() {
 110                 // already done in mysqlConnect()
 111                 return true;
 112         }
 113
 114         /**
 115          * @param string $charset
 116          * @return bool
 117          */
 118         protected function mysqlSetCharset( $charset ) {
 119                 if ( method_exists( $this->mConn, 'set_charset' ) ) {
 120                         return $this->mConn->set_charset( $charset );
 121                 } else {
 122                         return $this->query( 'SET NAMES ' . $charset, __METHOD__ );
 123                 }
 124         }
 125
 126         /**
 127          * @return bool
 128          */
 129         protected function closeConnection() {
 130                 return $this->mConn->close();
 131         }
 132
 133         /**
 134          * @return int
 135          */
 136         function insertId() {
 137                 return $this->mConn->insert_id;
 138         }
 139
 140         /**
 141          * @return int
 142          */
 143         function lastErrno() {
 144                 if ( $this->mConn ) {
 145                         return $this->mConn->errno;
 146                 } else {
 147                         return mysqli_connect_errno();
 148                 }
 149         }
 150
 151         /**
 152          * @return int
 153          */
 154         function affectedRows() {
 155                 return $this->mConn->affected_rows;
 156         }
 157
 158         /**
 159          * @param string $db
 160          * @return bool
 161          */
 162         function selectDB( $db ) {
 163                 $this->mDBname = $db;
 164
 165                 return $this->mConn->select_db( $db );
 166         }
 167
 168         /**
 169          * @param mysqli $res
 170          * @return bool
 171          */
 172         protected function mysqlFreeResult( $res ) {
 173                 $res->free_result();
 174
 175                 return true;
 176         }
 177
 178         /**
 179          * @param mysqli $res
 180          * @return bool
 181          */
 182         protected function mysqlFetchObject( $res ) {
 183                 $object = $res->fetch_object();
 184                 if ( $object === null ) {
 185                         return false;
 186                 }
 187
 188                 return $object;
 189         }
 190
 191         /**
 192          * @param mysqli $res
 193          * @return bool
 194          */
 195         protected function mysqlFetchArray( $res ) {
 196                 $array = $res->fetch_array();
 197                 if ( $array === null ) {
 198                         return false;
 199                 }
 200
 201                 return $array;
 202         }
 203
 204         /**
 205          * @param mysqli $res
 206          * @return mixed
 207          */
 208         protected function mysqlNumRows( $res ) {
 209                 return $res->num_rows;
 210         }
 211
 212         /**
 213          * @param mysqli $res
 214          * @return mixed
 215          */
 216         protected function mysqlNumFields( $res ) {
 217                 return $res->field_count;
 218         }
 219
 220         /**
 221          * @param mysqli $res
 222          * @param int $n
 223          * @return mixed
 224          */
 225         protected function mysqlFetchField( $res, $n ) {
 226                 $field = $res->fetch_field_direct( $n );
 227                 $field->not_null = $field->flags & MYSQLI_NOT_NULL_FLAG;
 228                 $field->primary_key = $field->flags & MYSQLI_PRI_KEY_FLAG;
 229                 $field->unique_key = $field->flags & MYSQLI_UNIQUE_KEY_FLAG;
 230                 $field->multiple_key = $field->flags & MYSQLI_MULTIPLE_KEY_FLAG;
 231                 $field->binary = $field->flags & MYSQLI_BINARY_FLAG;
 232
 233                 return $field;
 234         }
 235
 236         /**
 237          * @param resource|ResultWrapper $res
 238          * @param int $n
 239          * @return mixed
 240          */
 241         protected function mysqlFieldName( $res, $n ) {
 242                 $field = $res->fetch_field_direct( $n );
 243
 244                 return $field->name;
 245         }
 246
 247         /**
 248          * @param resource|ResultWrapper $res
 249          * @param int $n
 250          * @return mixed
 251          */
 252         protected function mysqlFieldType( $res, $n ) {
 253                 $field = $res->fetch_field_direct( $n );
 254
 255                 return $field->type;
 256         }
 257
 258         /**
 259          * @param resource|ResultWrapper $res
 260          * @param int $row
 261          * @return mixed
 262          */
 263         protected function mysqlDataSeek( $res, $row ) {
 264                 return $res->data_seek( $row );
 265         }
 266
 267         /**
 268          * @param mysqli $conn Optional connection object
 269          * @return string
 270          */
 271         protected function mysqlError( $conn = null ) {
 272                 if ( $conn === null ) {
 273                         return mysqli_connect_error();
 274                 } else {
 275                         return $conn->error;
 276                 }
 277         }
 278
 279         /**
 280          * Escapes special characters in a string for use in an SQL statement
 281          * @param string $s
 282          * @return string
 283          */
 284         protected function mysqlRealEscapeString( $s ) {
 285                 return $this->mConn->real_escape_string( $s );
 286         }
 287
 288         protected function mysqlPing() {
 289                 return $this->mConn->ping();
 290         }
 291
 292         /**
 293          * Give an id for the connection
 294          *
 295          * mysql driver used resource id, but mysqli objects cannot be cast to string.
 296          * @return string
 297          */
 298         public function __toString() {
 299                 if ( $this->mConn instanceof Mysqli ) {
 300                         return (string)$this->mConn->thread_id;
 301                 } else {
 302                         // mConn might be false or something.
 303                         return (string)$this->mConn;
 304                 }
 305         }
 306 }