Online PHP editor | refs for QPe5L

<?php $a = array(); for ($i = 0; $i < 10000; $i++) { $a[] = $i; } $start = microtime(true); foreach ($a as $k => $v) { $a[$k] = $v + 1; } echo "Completed in ", microtime(true) - $start, " Seconds\n"; $start = microtime(true); foreach ($a as $k => &$v) { $v = $v + 1; } echo "Completed in ", microtime(true) - $start, " Seconds\n"; $start = microtime(true); foreach ($a as $k => $v) {} echo "Completed in ", microtime(true) - $start, " Seconds\n"; $start = microtime(true); foreach ($a as $k => &$v) {} echo "Completed in ", microtime(true) - $start, " Seconds\n";