3v4l.org

run code in 300+ PHP versions simultaneously
<?php function build_array() { for ($i=0;$i<10000;$i++){ $a[$i]=$i; } $i=null; return $a; } echo memory_get_usage(true)."\n\r"; $a = build_array(); echo memory_get_usage(true)."\n\r"; unset($a); echo memory_get_usage(true)."\n\r";
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.4.0 - 7.4.1
2097152 2097152 2097152
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
262144 1835008 786432
preferences:
56.57 ms | 1262 KiB | 4 Q