Question

How to check if a number has zero in the center in PHP

Answer 1

function hasZeroInCenter($number) {
    // Convert the number to a string
    $numStr = (string)$number;
        
    if (strlen($numStr) % 2 == 0) {
        return false; // Even length = no center digit
    }
        
    $centerIndex = (int)(strlen($numStr) / 2);

    return $numStr[$centerIndex] == '0';
}

$number = 3720961;

if (hasZeroInCenter($number)) {
    echo "yes";
} else {
    echo "no";
}


/*
run:

yes

*/

 

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