3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a[''] = 123; print_r ($a); $b = ['' => 123]; print_r ($b);
based on IiF9E
Output for 5.4.0 - 7.2.0
Array ( [] => 123 ) Array ( [] => 123 )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/JPDnj on line 7
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/JPDnj on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/JPDnj on line 7
Process exited with code 255.