3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array( 45, 32, 54, 21, 521, 8465, 524 ); unset( $a[ 3 ] ); echo json_encode( $a );
Output for 5.2.0 - 5.6.30, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.3.0beta1
{"0":45,"1":32,"2":54,"4":521,"5":8465,"6":524}
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/5QJGY on line 7
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/5QJGY on line 7
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/5QJGY on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/5QJGY on line 7