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<?php declare(strict_types = 1); class HelloWorld { /** @var array<string, string> */ private $items; public function doFoo(string $input) { $this->items[$input] = $input; foreach ($this->items as $key => $value) { $this->requireString($key); } } public function requireString(string $s) { } } $h = new HelloWorld(); $h->doFoo('1'); // bang
Output for git.master_jit, git.master, rfc.property-hooks
Fatal error: Uncaught TypeError: HelloWorld::requireString(): Argument #1 ($s) must be of type string, int given, called in /in/OfRBH on line 13 and defined in /in/OfRBH:17 Stack trace: #0 /in/OfRBH(13): HelloWorld->requireString(1) #1 /in/OfRBH(24): HelloWorld->doFoo('1') #2 {main} thrown in /in/OfRBH on line 17
Process exited with code 255.

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