3v4l.org

run code in 150+ php & hhvm versions
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<?php $index_norm = array("key1" => "foobar", "key2" => "bananaramam", "key3" => "spam"); $result = array( "ids"=>array_keys($index_norm), "weights"=>array_values($index_norm) ); $json = json_encode($result); echo $json.PHP_EOL; $decoded = json_decode($json, true); var_dump($decoded); echo json_encode($decoded);
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
{"ids":["key1","key2","key3"],"weights":["foobar","bananaramam","spam"]} array(2) { ["ids"]=> array(3) { [0]=> string(4) "key1" [1]=> string(4) "key2" [2]=> string(4) "key3" } ["weights"]=> array(3) { [0]=> string(6) "foobar" [1]=> string(11) "bananaramam" [2]=> string(4) "spam" } } {"ids":["key1","key2","key3"],"weights":["foobar","bananaramam","spam"]}
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/FVurh on line 9
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/FVurh on line 9
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/FVurh on line 9
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/FVurh on line 9