- strtolower: documentation ( source)
<?php
$array = array('the','quick','brown','fox','jumps','over','the','lazy','dog');
for ($i = 0; $i < 50; $i++) {
$array[0] = 'the';
$l = sizeof($array);
for ($j = 0; $j < $l; $j++) {
$array[$j] = strtolower($array[$j]);
}
}