3v4l.org

run code in 300+ PHP versions simultaneously
<?php function microtime_float() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } $time_start = microtime_float(); var_dump($time); $time_end = microtime_float(); $time = round( ( $time_end - $time_start ) * 1000 ); echo "time: $time ms\n";

preferences:
25.23 ms | 402 KiB | 5 Q