3v4l.org

run code in 300+ PHP versions simultaneously
<?php $key = "XXXXX"; $test = array($key => "test5"); for ($x = 0; $x < 500; $x++) { $key .= "X"; $value = "test" . strlen($key); $test[$key] = $value; } echo "<pre>"; print_r($test); echo "</pre>"; ?>

preferences:
35.05 ms | 402 KiB | 5 Q