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<?php class Foo { protected $bla = ''; public function __construct(){ $this->bla = "fooooo"; } public function __invoke($arg){ $this->bla = $arg + $this->bla; } } Class Foo2 extends Foo { } $blubb = new Foo2(); $blubb("bl0a"); var_dump($blubb);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /in/7UmPp:12 Stack trace: #0 /in/7UmPp(23): Foo->__invoke('bl0a') #1 {main} thrown in /in/7UmPp on line 12
Process exited with code 255.

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