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<?php class ReferenceChecker { const FIRST = 0; function __initialize($starter = "AWB0") { $this->starter = $starter; } function check($reference) { return strpos($reference, $this->starter) === FIRST; } } $checker = new ReferenceChecker; $subject = "AWB012345"; $result = $checker->check($subject); var_dump($result); $subject = "12345"; $result = $checker->check($subject); var_dump($result);

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42.04 ms | 402 KiB | 5 Q