<?php $phones = [ '2345678', '00000000', '00100000', '123456789', '000000000', '12345678901234567', ]; foreach ($phones as $phone) { $length = strlen($phone); echo (ctype_digit(ltrim($phone, '0')) && $length >= 8 && $length <= 16 ? 'Pass' : 'Fail') . "\n"; }
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