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run code in 300+ PHP versions simultaneously
<?php function main() { $res = array_fill(0, 100, array()); $m = memory_get_usage(true); for ($i = 0; $i < 10000; $i++) { $res = $res + array(); } echo "$i operations of \$res+=array() eats: " . (memory_get_usage(true) - $m) . "\n"; } main();
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 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
10000 operations of $res+=array() eats: 0
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/Xgl8g on line 5
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: memory_get_usage() in /in/Xgl8g on line 5
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/Xgl8g on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: memory_get_usage() in /in/Xgl8g on line 5
preferences:
228.7 ms | 401 KiB | 325 Q