3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($i=0; $i<10; $i++) { $a = range(1, 10000); $a = null; echo 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 2097152 2097152 2097152 2097152 2097152 2097152
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28
786432 786432 786432 786432 786432 786432 786432 786432 786432 786432
Output for 5.3.0 - 5.3.29
1310720 1310720 1310720 1310720 1310720 1310720 1310720 1310720 1310720 1310720
Output for 5.2.1 - 5.2.17
524288 524288 524288 524288 524288 524288 524288 524288 524288 524288
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/K5h1u 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/K5h1u on line 6
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/K5h1u 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/K5h1u on line 6
preferences:
163.72 ms | 401 KiB | 256 Q