3v4l.org

run code in 300+ PHP versions simultaneously
<?php $idfred = '123.Fred'; $fred = substr($idfred, ++strpos($idfred, '.')); echo $fred, "<br>"; $fred = preg_replace('/^([^.]*)./', '', $idfred); echo $fred, "<br>";
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.18
Fatal error: Can't use function return value in write context in /in/3RbSq on line 4
Process exited with code 255.
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176.69 ms | 1395 KiB | 54 Q