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<?php declare(strict_types=1); function doStuff(string $key, string $value) { echo "{$key} => {$value}\n"; } $array = [ '1' => '1', '2' => '2', '3' => '3', ]; foreach ($array as $key => $value) { var_dump($key); doStuff($key, $value); }
Output for git.master, git.master_jit, rfc.property-hooks
int(1) Fatal error: Uncaught TypeError: doStuff(): Argument #1 ($key) must be of type string, int given, called in /in/CqQtL on line 18 and defined in /in/CqQtL:5 Stack trace: #0 /in/CqQtL(18): doStuff(1, '1') #1 {main} thrown in /in/CqQtL on line 5
Process exited with code 255.

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