3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Example implements JsonSerializable { public function jsonSerialize() { return range('a', 'z'); } } echo json_encode(new Example);
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Example::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/8BJY3 on line 5 ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
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 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
Output for 5.3.0 - 5.3.29
Fatal error: Interface 'JsonSerializable' not found in /in/8BJY3 on line 4
Process exited with code 255.
Output for 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Interface 'JsonSerializable' not found in /in/8BJY3 on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'JsonSerializable' not found in /in/8BJY3 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/8BJY3 on line 3
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
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/8BJY3 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/8BJY3 on line 3
Process exited with code 255.

preferences:
256.61 ms | 401 KiB | 353 Q