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<?php echo '<pre>'; $a = ' \\\n'; echo $a.'<br>'; if (preg_match('%\\%i', $a, $regs)) { var_dump($regs); } else { echo 'Failed.'; }
Output for 4.3.11 - 7.1.0
<pre> \\n<br> Warning: preg_match(): No ending delimiter '%' found in /in/0S9t7 on line 7 Failed.
Output for 4.3.0 - 4.3.10
<pre> \\n<br> Warning: No ending delimiter '%' found in /in/0S9t7 on line 7 Failed.