3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(json_encode(array())); var_dump(json_encode((object) array())); var_dump(json_encode(new stdClass)); var_dump(json_encode(array('foo', 'bar', 'baz'))); var_dump(json_encode((object) array('foo', 'bar', 'baz'))); var_dump(json_encode(array('foo' => 'bar', 'baz'))); var_dump(json_encode(array('foo' => 'bar', 'baz' => 'bak')));
based on gAfgp
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(2) "[]" string(2) "{}" string(2) "{}" string(19) "["foo","bar","baz"]" string(31) "{"0":"foo","1":"bar","2":"baz"}" string(23) "{"foo":"bar","0":"baz"}" string(25) "{"foo":"bar","baz":"bak"}"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/cYBju on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/cYBju on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/cYBju on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/cYBju on line 2