Question

How to select random two digits from anywhere in a number with PHP

Answer 1

// Function to select random two distinct digits from a number
function getRandomTwoDigits($number) {
    $numStr = strval($number);

    if (strlen($numStr) < 2) {
        return "Error: number must have at least 2 digits";
    }

    // Generate two distinct random indices
    $i = rand(0, strlen($numStr) - 1);
    do {
        $j = rand(0, strlen($numStr) - 1);
    } while ($j == $i);  // ensure different positions

    // Form the two-digit string
    return $numStr[$i] . $numStr[$j];
}

function main() {
    $num = 1234567;
    $randomTwo = getRandomTwoDigits($num);

    echo "Random two digits: " . $randomTwo . PHP_EOL;
}

main();



/*
run:

Random two digits: 26

*/

 

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