3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(); for ($i=0; $i<100000; $i++) $a[] = $i; $a = implode(',', $a); // or $a = json_encode($a); echo number_format(memory_get_usage(true)/1048576, 2)."\n";
Output for 7.0.0 - 7.1.0
4.00
Output for hhvm-3.12.0
1.04
Output for hhvm-3.10.0
1.03
Output for 5.4.0 - 5.6.28
1.50
Output for 5.3.0 - 5.3.29
2.00
Output for 5.2.1 - 5.2.17
1.25
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/EW3uO 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/EW3uO 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/EW3uO 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/EW3uO on line 6