3v4l.org

run code in 300+ PHP versions simultaneously
<?php $assoc = count_chars('hello', 1); var_export( array_reduce( array_keys($assoc), fn ($result, $k) => $result += [chr($k) => $assoc[$k]], [] ) ); var_export( array_count_values(str_split('hello')) );
preferences:
28.29 ms | 410 KiB | 5 Q