3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('<foo>',"'bar'",'"baz"','&blong&', "\xc3\xa9"); echo json_encode($a, JSON_HEX_TAG);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
["\u003Cfoo\u003E","'bar'","\"baz\"","&blong&","\u00e9"]
Output for 5.2.0 - 5.2.17
Notice: Use of undefined constant JSON_HEX_TAG - assumed 'JSON_HEX_TAG' in /in/RRsJL on line 4 Warning: json_encode() expects exactly 1 parameter, 2 given in /in/RRsJL on line 4
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/RRsJL on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/RRsJL on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/RRsJL on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/RRsJL on line 4