3v4l.org

run code in 300+ PHP versions simultaneously
<?php class SerializableObject implements JsonSerializable { public function jsonSerialize() { return array('foo' => 'bar'); } } class MultipleNonCircularReference implements JsonSerializable { public function jsonSerialize() { $obj = new SerializableObject(); return array('a' => 123)); } } var_dump(json_encode(new SerializableObject()));
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.32
Parse error: syntax error, unexpected ')' in /in/0Xq9B on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ')' in /in/0Xq9B on line 15
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/0Xq9B 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/0Xq9B on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/0Xq9B on line 3
Process exited with code 255.
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220.32 ms | 1395 KiB | 123 Q