3v4l.org

run code in 300+ PHP versions simultaneously
<?php set_error_handler("custom_warning_handler"); function custom_warning_handler($errno, $errstr) { switch ($errno) { case E_NOTICE: echo $errstr . "\n"; return true; break; default: return false; break; } } $myvar; echo $myvar; $myvar = 3; $myvarb = 5; echo join(' ',array($myvar,$myvarb));

preferences:
51.21 ms | 402 KiB | 5 Q