3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ez = array( 'ez5' => 'ez', 'ez4' => 'ez', 'ez3' => 'ez', 'ez2' => 'ez', 'ez1' => 'ez', ); function lmao( $key, $val ) { return "$key$val"; } var_dump( array_map( 'lmao', array_keys( $ez ), $ez ) );

preferences:
26.7 ms | 402 KiB | 5 Q