3v4l.org

run code in 300+ PHP versions simultaneously
<?php $opel= array( key => "vectra", key2 => 1999, key3 => 4, key4 => "green", ); $dodge= array( key => "DODGE CHALLENGER GT ALL-WHEEL DRIVE", key2 => 2017, key3 => 2, key4 => "rad", ); $mercmaybach= array( key => "Mercedes-Maybach S600", key2 => 2017, key3 => 4, key4 => "black" ); $arr=array($opel,$dodge,$mercmaybach); foreach ($arr as $value) { print_r($value); echo"<br>"; } ?>
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant "key" in /in/VILgt:3 Stack trace: #0 {main} thrown in /in/VILgt on line 3
Process exited with code 255.

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