3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $memory1 = memory_get_usage(true); print 'before: ' . $memory1 ."\n"; $keys = array(); for ($i = 0; $i<1000; $i++) { $keys[] = 'pref:keyname:' . rand(1000000, 9999999); } asort($keys); $memory2 = memory_get_usage(true); print 'after: ' . $memory2 ."\n"; print 'allocated: ' . ($memory2 - $memory1);
Output for 7.0.0 - 7.1.0
before: 2097152 after: 2097152 allocated: 0
Output for hhvm-3.12.0
before: 305064 after: 398168 allocated: 93104
Output for hhvm-3.10.0
before: 303424 after: 396528 allocated: 93104
Output for 5.4.0 - 5.6.28
before: 262144 after: 524288 allocated: 262144
Output for 5.3.0 - 5.3.29
before: 786432 after: 1048576 allocated: 262144
Output for 5.2.1 - 5.2.17
before: 262144 after: 262144 allocated: 0
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/tQDFo 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/tQDFo 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/tQDFo 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/tQDFo on line 2