3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = memory_get_usage(); $str = str_repeat('0123456789', 100); var_dump(memory_get_usage() - $start);
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
int(1280)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
int(1296)
preferences:
168.93 ms | 402 KiB | 242 Q