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<?php class Shirt { public function test() { return "Shirt"; } } class Sweater extends Shirt { public function test() { return "Sweater"; } public function doSweaterStuff() { echo "This is a sweater!"; } } $shirt = new Shirt(); output_shirt($shirt); function output_shirt(Sweater $sweater) { $sweater->doSweaterStuff(); echo $sweater->test(); }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: output_shirt(): Argument #1 ($sweater) must be of type Sweater, Shirt given, called in /in/u7gXP on line 29 and defined in /in/u7gXP:31 Stack trace: #0 /in/u7gXP(29): output_shirt(Object(Shirt)) #1 {main} thrown in /in/u7gXP on line 31
Process exited with code 255.

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