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run code in 300+ PHP versions simultaneously
<?php var_dump(memory_get_usage()); $arr = [1,2,3]; var_dump(memory_get_usage()); foreach ($arr as $k => $v) { var_dump(memory_get_usage()); if (!isset($arr[$k])) { var_dump(memory_get_usage()); } }
Output for 7.2.0
int(384280) int(384312) int(384312) int(384312) int(384312)
Output for 7.1.0, 7.1.7
int(347640) int(347672) int(347672) int(347672) int(347672)
Output for 7.1.5 - 7.1.6
int(347992) int(348024) int(348024) int(348024) int(348024)
Output for 7.0.0 - 7.0.20
int(347640) int(348048) int(348048) int(348048) int(348048)
Output for 5.6.8 - 5.6.28
int(218304) int(219064) int(219288) int(219288) int(219288)
Output for 5.5.24 - 5.5.35
int(218304) int(219048) int(219272) int(219272) int(219272)
Output for 5.4.10 - 5.4.45
int(218824) int(219568) int(219792) int(219792) int(219792)
Output for 5.4.0 - 5.4.9
int(218296) int(219040) int(219264) int(219264) int(219264)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/T3J1N on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/T3J1N on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/T3J1N on line 5
Process exited with code 255.

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