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<?php class A { static $someFunction; // Throws error. static function foo() { static::$someFunction(); } // Works static function bar() { $func = static::$someFunction; $func(); } } A::$someFunction = function() { print "wtf\n";}; A::bar(); A::foo();
Output for git.master, git.master_jit, rfc.property-hooks
wtf Warning: Undefined variable $someFunction in /in/0SPfW on line 8 Fatal error: Uncaught Error: Method name must be a string in /in/0SPfW:8 Stack trace: #0 /in/0SPfW(21): A::foo() #1 {main} thrown in /in/0SPfW on line 8
Process exited with code 255.

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