Example showing how inefficient foreach + range are together (thanks to PHP returning the full array instead of doing it like e.g. python which is yielding the current number when looping over a range). Setting range to 1000000 will exhaust 128MB memory in PHP while the for loop has no such limit.

loop.php

<?php
$s = microtime(true);
$c = 0;
foreach(range(1, 100000) as $i) {
    $c++;
}
$e = microtime(true);
printf("Foreach :: Time: %f, count: %d\n", $e-$s, $c);

$s = microtime(true);
$c = 0;
for ($i = 0; $i < 100000; $i++) {
    $c++;
}
$e = microtime(true);
printf("For :: Time: %f, count: %d", $e-$s, $c);