3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump( ""[f] );
Output for 5.5.24 - 5.6.28, 7.0.0 - 7.1.0
Notice: Use of undefined constant f - assumed 'f' in /in/AJTvv on line 4 Warning: Illegal string offset 'f' in /in/AJTvv on line 4 Notice: Uninitialized string offset: 0 in /in/AJTvv on line 4 string(0) ""
Output for hhvm-3.12.0
Notice: Use of undefined constant f - assumed 'f' in /in/AJTvv on line -1 string(0) ""
Output for hhvm-3.10.0
Notice: Use of undefined constant f - assumed 'f' in /in/AJTvv on line 4 string(0) ""
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.4.45
Parse error: syntax error, unexpected '[' in /in/AJTvv on line 4
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/AJTvv on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AJTvv on line 4
Process exited with code 255.