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@ 2023-01-26T10:07:24Z

<?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";
}

Output
Performance
VLD
References
Branches

ltrim: documentation ( source)
ctype_digit: documentation ( source)

preferences:dark modelive previewkey bindings

86.19 ms | 1119 KiB | 5 Q