3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = (array) json_decode('{"1":1,"2":1}'); var_dump($array); var_dump(array_key_exists(1, $array)); var_dump(array_key_exists("1", $array)); foreach ($array as $k => $v) { var_dump($k, $v); }
Output for 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(2) { [1]=> int(1) [2]=> int(1) } bool(true) bool(true) int(1) int(1) int(2) int(1)
Output for 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 - 5.6.30, 7.0.0 - 7.0.24, 7.1.0 - 7.1.33
array(2) { ["1"]=> int(1) ["2"]=> int(1) } bool(false) bool(false) string(1) "1" int(1) string(1) "2" int(1)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Call to undefined function json_decode() in /in/ACrH6 on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_decode() in /in/ACrH6 on line 3
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: json_decode() in /in/ACrH6 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_decode() in /in/ACrH6 on line 3
preferences:
154.19 ms | 411 KiB | 5 Q