3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array(); print memory_get_usage(true) . PHP_EOL; $array['key1'] = md5('val1'); print memory_get_usage(true) . PHP_EOL; $array['key2'] = 'val2'; print memory_get_usage(true) . PHP_EOL; $array['key3'] = 'val3'; print memory_get_usage(true) . PHP_EOL;
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
2097152 2097152 2097152 2097152
Output for 5.2.1 - 5.2.17, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
262144 262144 262144 262144
Output for 5.3.0 - 5.3.29
786432 786432 786432 786432
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
Fatal error: Call to undefined function memory_get_usage() in /in/MHFpA on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/MHFpA on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: memory_get_usage() in /in/MHFpA on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/MHFpA on line 4
preferences:
153.44 ms | 401 KiB | 249 Q