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run code in 150+ php & hhvm versions
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<?php var_dump(json_encode(array(array('username' => 'meh', 'love_points' => 42), array('username' => 'nope', 'love_points' => 23))));
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(74) "[{"username":"meh","love_points":42},{"username":"nope","love_points":23}]"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/RIOUt 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/RIOUt 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/RIOUt 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/RIOUt on line 2