3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $factorial = function( $n ) { if( $n == 1 ) return 1; return $factorial( $n - 1 ) * $n; }; print $factorial( 5 );
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: factorial in /in/pD8Xr on line 5 Fatal error: Uncaught Error: Function name must be a string in /in/pD8Xr:5 Stack trace: #0 /in/pD8Xr(7): {closure}(5) #1 {main} thrown in /in/pD8Xr on line 5
Process exited with code 255.
Output for 5.3.0 - 5.6.28
Notice: Undefined variable: factorial in /in/pD8Xr on line 5 Fatal error: Function name must be a string in /in/pD8Xr on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/pD8Xr on line 3
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 T_FUNCTION in /in/pD8Xr on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pD8Xr on line 3
Process exited with code 255.