3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = array(); for($i = 0; $i < 8000; $i++) { $data[] = "あ"; } echo "point1:".memory_get_usage()."\n"; foreach ($data as $d) {} echo "point2:".memory_get_usage()."\n";
Output for 7.3.0 - 7.3.12
point1:653896 point2:653928
Output for 7.2.0 - 7.2.24
point1:650008 point2:650040
Output for 7.1.0 - 7.1.1, 7.1.7 - 7.1.33
point1:613400 point2:613432
Output for 7.1.2 - 7.1.6
point1:613528 point2:613560
Output for 7.0.0 - 7.0.31
point1:613416 point2:613448
Output for 5.6.0 - 5.6.38
point1:1371896 point2:1372032
Output for 5.5.0 - 5.5.38
point1:1371896 point2:1372016
Output for 5.4.10 - 5.4.45
point1:1372432 point2:1372552
Output for 5.4.0 - 5.4.9
point1:1371888 point2:1372008
Output for 5.3.11 - 5.3.29
point1:2030984 point2:2031112
Output for 5.3.0 - 5.3.10
point1:2030656 point2:2030784
Output for 5.2.10 - 5.2.17
point1:1424616 point2:1424744
Output for 5.2.7 - 5.2.9
point1:1426192 point2:1426424
Output for 5.2.3 - 5.2.6
point1:1426512 point2:1426744
Output for 5.2.2
point1:1424552 point2:1424712
Output for 5.2.1
point1:1424040 point2:1424240
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/fDfBZ 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/fDfBZ 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/fDfBZ 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/fDfBZ on line 6
preferences:
223.15 ms | 401 KiB | 315 Q