3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = 0; $y = 0; $x = memory_get_usage(); $s = str_repeat('c', 1200); $y = memory_get_usage(); echo $y - $x, PHP_EOL; $s1 = (string)$s; $x = memory_get_usage(); echo $x - $y, PHP_EOL;
Output for 7.0.0 - 7.1.0
1280 32
Output for hhvm-3.10.0 - 3.12.0
0 0
Output for 5.6.0 - 5.6.28
1360 1416
Output for 5.2.10 - 5.2.17, 5.4.0 - 5.5.35
1360 1392
Output for 5.3.0 - 5.3.29
1368 1400
Output for 5.2.3 - 5.2.9
1400 1352
Output for 5.2.1 - 5.2.2
1400 1320
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/MLuGq on line 6
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/MLuGq on line 6
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: memory_get_usage() in /in/MLuGq on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/MLuGq on line 6