3v4l.org

run code in 300+ PHP versions simultaneously
<?php $memoryUsage = memory_get_peak_usage(false); trim('a'); $memoryUsage = abs(memory_get_peak_usage(false) - $memoryUsage); var_dump($memoryUsage); $memoryUsage = memory_get_peak_usage(true); trim('a'); $memoryUsage = abs(memory_get_peak_usage(true) - $memoryUsage); var_dump($memoryUsage);

preferences:
25.98 ms | 407 KiB | 5 Q