3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { function __construct() { $this->bar = new Bar($this); } function __descruct() { unset($this->bar); } } class Bar { function __construct($foo = null) { $this->foo = $foo; } } $i = 1; while ($i++ < 1000) { $foo = new Foo(); unset($foo); if ($i > 990) { echo number_format(memory_get_usage()) . "\n"; } }
Output for 7.4.0 - 7.4.1
1,220,808 1,221,672 1,222,504 1,223,336 1,224,168 1,225,000 1,225,832 1,226,664 1,227,496 1,228,328
Output for 7.3.0 - 7.3.13
1,220,936 1,221,800 1,222,632 1,223,464 1,224,296 1,225,128 1,225,960 1,226,792 1,227,624 1,228,456
Output for 7.2.0 - 7.2.26
1,217,032 1,217,896 1,218,728 1,219,560 1,220,392 1,221,224 1,222,056 1,222,888 1,223,720 1,224,552
Output for 7.1.0 - 7.1.33
1,180,360 1,181,224 1,182,056 1,182,888 1,183,720 1,184,552 1,185,384 1,186,216 1,187,048 1,187,880
Output for 7.0.0 - 7.0.33
1,180,384 1,181,248 1,182,080 1,182,912 1,183,744 1,184,576 1,185,408 1,186,240 1,187,072 1,187,904
Output for 5.6.0 - 5.6.40
985,352 986,104 986,808 987,512 988,216 988,920 989,624 990,328 991,032 991,736
Output for 5.5.0 - 5.5.38
985,288 986,024 986,728 987,432 988,136 988,840 989,544 990,248 990,952 991,656
Output for 5.4.0 - 5.4.45
985,864 986,600 987,304 988,008 988,712 989,416 990,120 990,824 991,528 992,232
Output for 5.3.11 - 5.3.29
1,389,080 1,389,816 1,390,520 1,391,224 1,391,928 1,392,632 1,393,336 1,394,040 1,394,744 1,395,448
Output for 5.3.0 - 5.3.10
1,388,768 1,389,504 1,390,208 1,390,912 1,391,616 1,392,320 1,393,024 1,393,728 1,394,432 1,395,136
Output for 5.2.10 - 5.2.17
815,408 816,128 816,816 817,504 818,192 818,880 819,568 820,256 820,944 821,632
Output for 5.2.7 - 5.2.9
816,632 817,352 818,040 818,728 819,416 820,104 820,792 821,480 822,168 822,856
Output for 5.2.3 - 5.2.6
816,920 817,640 818,328 819,016 819,704 820,392 821,080 821,768 822,456 823,144
Output for 5.2.2
814,792 815,512 816,200 816,888 817,576 818,264 818,952 819,640 820,328 821,016
Output for 5.2.1
814,856 815,576 816,264 816,952 817,640 818,328 819,016 819,704 820,392 821,080
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/WVgY1 on line 24
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/WVgY1 on line 24
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/WVgY1 on line 24
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/WVgY1 on line 24
preferences:
221.85 ms | 401 KiB | 325 Q