3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dataset = array("a" > "one", "b" > "two", "c" => "three"); function foo($a, $b) { return false; } foreach($dataset as $key => $val) { $dataset[$key] = foo($val, 'bar'); var_dump($dataset[$key], $key, $val, "<br/>\n"); }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 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 - 7.2.33, 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
bool(false) int(0) bool(false) string(6) "<br/> " bool(false) int(1) bool(false) string(6) "<br/> " bool(false) string(1) "c" string(5) "three" string(6) "<br/> "
preferences:
281.01 ms | 406 KiB | 459 Q