3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test($str) { test2($str); } function test2($str) { test3($str); } function test3($str) { echo "before: ".round(memory_get_usage()/1024/1024, 2)." MB\n"; debug_backtrace(false); echo "after: ".round(memory_get_usage()/1024/1024, 2)." MB\n"; } test(str_repeat('a', 10000000));
Output for 7.0.0 - 7.1.0
before: 9.87 MB after: 9.87 MB
Output for 5.4.0 - 5.6.28
before: 9.75 MB after: 38.36 MB
Output for 5.3.0 - 5.3.29
before: 10.13 MB after: 38.74 MB
Output for 5.2.5 - 5.2.17
before: 9.62 MB after: 38.23 MB
Output for 5.2.1 - 5.2.4
before: 9.62 MB Warning: Wrong parameter count for debug_backtrace() in /in/cJpmi on line 10 after: 9.62 MB
Output for 5.0.0 - 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/cJpmi on line 9
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/cJpmi on line 9
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: memory_get_usage() in /in/cJpmi on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/cJpmi on line 9