3v4l.org

run code in 300+ PHP versions simultaneously
<?php $m = memory_get_usage(); $a = 1; var_dump(memory_get_usage()-$m);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.24, 7.3.0 - 7.3.12
int(0)
Output for 5.2.1 - 5.2.17, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
int(272)
Output for 5.3.0 - 5.3.29
int(288)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/BJK4P on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/BJK4P on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: memory_get_usage() in /in/BJK4P on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/BJK4P on line 2
preferences:
165.57 ms | 401 KiB | 221 Q