3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('cols' => array( array('id' => '', 'label' => 'Option', 'pattern' => '', 'type' => 'string' ))); echo json_encode($a);
Output for 5.2.0 - 7.1.0
{"cols":[{"id":"","label":"Option","pattern":"","type":"string"}]}
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/XY3lK on line 13
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/XY3lK on line 13
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/XY3lK on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/XY3lK on line 13