3v4l.org

run code in 300+ PHP versions simultaneously
<?php function main() { $b = 12; $a = array('abc'=>65,'bcd'=>66,'cde'=>67,'def'=>68,'efg'=>69,'quux'=>&$b); $x = serialize($a); for ($i = 0; $i < 1000000; $i++) { $y = unserialize($x); } var_dump($x); var_dump($y); } main();
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(97) "a:6:{s:3:"abc";i:65;s:3:"bcd";i:66;s:3:"cde";i:67;s:3:"def";i:68;s:3:"efg";i:69;s:4:"quux";i:12;}" array(6) { ["abc"]=> int(65) ["bcd"]=> int(66) ["cde"]=> int(67) ["def"]=> int(68) ["efg"]=> int(69) ["quux"]=> int(12) }

preferences:
200.08 ms | 405 KiB | 303 Q