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run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = "¤"; $x .= "ä"; $re = '/ä/i'; preg_replace($re, '', $x); print "<pre>" . $x . "</pre>"; print "<br />Done";
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
<pre>¤ä</pre><br />Done