3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['banana','apple','corn',['pear','coconut']]; echo'<pre>'; print_r(array_map(array_fill_keys($array,[],$array))); print_r(array_fill_keys($array,[]));

preferences:
38.35 ms | 402 KiB | 5 Q