- var_dump: documentation ( source)
- memory_get_peak_usage: documentation ( source)
<?php
function createInstance() {
return new class {};
}
$startMemory = memory_get_peak_usage();
for ($i = 0; $i < 10000; $i++) {
createInstance();
}
var_dump((memory_get_peak_usage() - $startMemory) / 1024**2); // MB