3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(-1); $a = ["b" => 2]; print "notice: ".$a[b]."\n"; print "no notice: {$a[b]}";
Output for 5.4.0 - 7.1.0
Notice: Use of undefined constant b - assumed 'b' in /in/D6vMV on line 7 notice: 2 Notice: Use of undefined constant b - assumed 'b' in /in/D6vMV on line 9 no notice: 2
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/D6vMV on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/D6vMV on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/D6vMV on line 5
Process exited with code 255.