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<?php $factorial = function( $n ) { if( $n == 1 ) return 1; return $factorial( $n - 1 ) * $n; }; print $factorial( 5 );
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $factorial in /in/pD8Xr on line 5 Fatal error: Uncaught Error: Value of type null is not callable 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.

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