3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array("a" =>"b", "c"=>"d"); if(isset($a['a'])) echo "hi"; else echo "hello"; $b = array("a","b","c"); if(in_array('a',$b)) echo "hi"; else echo "hello"; json_encode(array_merge(array("1","2"), array("2","3","4")));
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
hihi
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
hihi Fatal error: Call to undefined function json_encode() in /in/bojc6 on line 18
Process exited with code 255.
Output for 4.4.5 - 4.4.9
hihi Fatal error: Call to undefined function: json_encode() in /in/bojc6 on line 18
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
hihi Fatal error: Call to undefined function: json_encode() in /in/bojc6 on line 18
Process exited with code 255.
Output for 4.3.0 - 4.3.1
hihi Fatal error: Call to undefined function: json_encode() in /in/bojc6 on line 18
preferences:
209.24 ms | 401 KiB | 425 Q