3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Foreach - inline $results = []; $aHash = []; $i = 0; $tmp = ''; while ($i < 10000) { $tmp .= 'a'; ++$i; } $aHash = array_fill(100000000000000000000000, 100, $tmp); unset($i, $tmp); /* The Test */ $t = microtime(true); foreach ($aHash as $key => $val) $aHash[$key] .= "a"; echo (microtime(true) - $t) * 1000000;

preferences:
38.1 ms | 402 KiB | 5 Q