3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = memory_get_usage(); $b = memory_get_usage(); $a = memory_get_usage(); $array(); $b = memory_get_usage(); echo($b - $a); ?>
Output for 7.0.0 - 7.1.0
Notice: Undefined variable: array in /in/YqVbC on line 6 Fatal error: Uncaught Error: Function name must be a string in /in/YqVbC:6 Stack trace: #0 {main} thrown in /in/YqVbC on line 6
Process exited with code 255.
Output for hhvm-3.12.0
Notice: Undefined variable: array in /in/YqVbC on line -1 Fatal error: Function name must be a string in /in/YqVbC on line -1
Process exited with code 255.
Output for 5.2.1 - 5.6.28, hhvm-3.10.0
Notice: Undefined variable: array in /in/YqVbC on line 6 Fatal error: Function name must be a string in /in/YqVbC on line 6
Process exited with code 255.
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/YqVbC 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/YqVbC on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: memory_get_usage() in /in/YqVbC 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/YqVbC on line 2