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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1=>1, "2"=>"2", 3=>"3", "4"=>4); echo json_encode($a,JSON_NUMERIC_CHECK); echo json_encode($a);
Output for 5.3.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
{"1":1,"2":2,"3":3,"4":4}{"1":1,"2":"2","3":"3","4":4}
Output for 5.3.0 - 5.3.2
Notice: Use of undefined constant JSON_NUMERIC_CHECK - assumed 'JSON_NUMERIC_CHECK' in /in/k01cT on line 3 Warning: json_encode() expects parameter 2 to be long, string given in /in/k01cT on line 3 {"1":1,"2":"2","3":"3","4":4}
Output for 5.2.0 - 5.2.17
Notice: Use of undefined constant JSON_NUMERIC_CHECK - assumed 'JSON_NUMERIC_CHECK' in /in/k01cT on line 3 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/k01cT on line 3 {"1":1,"2":"2","3":"3","4":4}
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/k01cT on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/k01cT on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/k01cT on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/k01cT on line 3