3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function abc($a) { unset($a[-1]); } $a = range(1, 5000); echo memory_get_peak_usage(), "\n"; abc($a); echo memory_get_peak_usage(), "\n";
Output for 7.0.0 - 7.1.0
613336 879664
Output for hhvm-3.10.0 - 3.12.0
2097152 2097152
Output for 5.5.0 - 5.6.28
966056 1471792
Output for 5.4.0 - 5.4.45
966480 1472216
Output for 5.3.11 - 5.3.29
1368544 1874320
Output for 5.3.0 - 5.3.10
1368264 1874048
Output for 5.2.10 - 5.2.17
786432 1292296
Output for 5.2.7 - 5.2.9
786480 1292352
Output for 5.2.3 - 5.2.6
786776 1292640
Output for 5.2.2
784728 1290568
Output for 5.2.1
784192 1290016
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_peak_usage() in /in/PPCeF on line 10
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_peak_usage() in /in/PPCeF on line 10
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: memory_get_peak_usage() in /in/PPCeF on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_peak_usage() in /in/PPCeF on line 10