- gc_collect_cycles: documentation ( source)
- memory_get_usage: documentation ( source)
<?php
for ($i = 0; $i < 10; $i++) {
eval('return function() {};');
gc_collect_cycles();
$new = memory_get_usage();
if (isset($old)) {
echo ($new - $old) . "\n";
}
$old = $new;
}