From:             kevin at les-tilleuls dot coop
Operating system: Mac OS X
PHP version:      5.5.3
Package:          PDO related
Bug Type:         Bug
Bug description:PDO MySQL driver does not escape properly backslashes

Description:
------------
PDO MySQL driver does not escape backslashes in string.

The MySQL doc indicates that backslashes must be doubled to be escaped 
http://dev.mysql.com/doc/refman/5.6/en/string-literals.html

The driver does not do that. See the script above.
Should this escaping be done by PDO or a higher layer like Doctrine DBAL?

Test script:
---------------
<?php

define('DSN', 'mysql:dbname=testdb;host=127.0.0.1');
define('USER', 'root');
define('PASSWORD', '');

/* DATABASE STRUCTURE

CREATE TABLE `test` (
  `test` varchar(255) NOT NULL,
  PRIMARY KEY (`test`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

*/

$dbh = new PDO(DSN, USER, PASSWORD);

$data = '\\' . uniqid();

$stmt = $dbh->prepare('INSERT INTO test(test) VALUES(:data)');
$stmt->execute(array('data' => $data));


$stmt = $dbh->prepare('SELECT test FROM test WHERE test LIKE :data');
$stmt->execute(array('data' => $data));

var_dump($stmt->fetchColumn());

$stmt = $dbh->prepare('SELECT test FROM test WHERE test LIKE :data');
$stmt->execute(array('data' =>  str_replace('\\', '\\\\', $data)));

var_dump($stmt->fetchColumn());


Expected result:
----------------
string(14) "\521f3f450f597"
bool(false)

Actual result:
--------------
bool(false)
string(14) "\521f3f450f597"

-- 
Edit bug report at https://bugs.php.net/bug.php?id=65583&edit=1
-- 
Try a snapshot (PHP 5.4):   
https://bugs.php.net/fix.php?id=65583&r=trysnapshot54
Try a snapshot (PHP 5.3):   
https://bugs.php.net/fix.php?id=65583&r=trysnapshot53
Try a snapshot (trunk):     
https://bugs.php.net/fix.php?id=65583&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=65583&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=65583&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=65583&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=65583&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=65583&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=65583&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=65583&r=notwrong
Not enough info:            
https://bugs.php.net/fix.php?id=65583&r=notenoughinfo
Submitted twice:            
https://bugs.php.net/fix.php?id=65583&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=65583&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65583&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=65583&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=65583&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=65583&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=65583&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=65583&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=65583&r=mysqlcfg

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