3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function sq(x) { return x * x; } ${'foo' . sq(2)} = 'bar'; echo $foo4;
based on XpgLv
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Parse error: syntax error, unexpected ')', expecting variable (T_VARIABLE) in /in/AXDQl on line 3
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: syntax error, unexpected ')', expecting '&' or T_VARIABLE or ... in /in/AXDQl:3 Stack trace: #0 {main}
Process exited with code 255.