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Could someone help me with the php code?

Z

zorakila

Member
Banned User
May 6, 2019
44
6
8
I need a simple php code that generates random numbers
with 16 digits.
Example:
0000-0000-0000-000
in this format with the separations and a button to generate random.
Could anyone help?
 
You aren't getting responses because you haven't tried it by yourself and you want someone to write it for you. We can help. Show us the code you wrote until now and ask whatever you don't understand about it. It's like 3-4 lines of code. What are the errors that you are facing and so on. Alternatively, ask Google.
 
  • Like
Reactions: PrinceK
I may regret this. Don't PM me to write your code. Create threads and tag me. If I can help, I'll jump in.

PHP: 
// Generate a random 16-digit number
$random_number = str_pad(mt_rand(1, 9999999999999999), 16, '0', STR_PAD_LEFT);

// Format the number with dashes every 4 digits
$random_number = chunk_split($random_number, 4, '-');

// Remove the last dash
$random_number = rtrim($random_number, '-');

// Output the formatted number
echo $random_number;
 
Please provide the required code
And if you need any modification I will help you


Code: 
<?php
function generateRandomNumber() {
    $part1 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part2 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part3 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part4 = str_pad(mt_rand(0, 999), 3, '0', STR_PAD_LEFT);
    return "{$part1}-{$part2}-{$part3}-{$part4}";
}

if (isset($_POST['generate'])) {
    $randomNumber = generateRandomNumber();
} else {
    $randomNumber = "";
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Generate Random Number</title>
</head>
<body>
    <form method="post">
        <label for="number">Random Number:</label>
        <input type="text" name="number" id="number" value="<?php echo $randomNumber; ?>" readonly><br><br>
        <input type="submit" name="generate" value="Generate">
    </form>
</body>
</html>
 
here you go


PHP: 
<?php
function generateRandomNumber() {
  $random_bytes = random_bytes(8);
  $num = hexdec(bin2hex($random_bytes)) % (10 ** 16); // Convert random bytes to a 16-digit number
  $formatted_num = sprintf('%04d-%04d-%04d-%04d', $num / 10 ** 12, ($num / 10 ** 8) % 10 ** 4, ($num / 10 ** 4) % 10 ** 4, $num % 10 ** 4); // Format number with hyphens
  return $formatted_num;
}
?>

<html>
<head>
  <title>Random Number Generator</title>
</head>
<body>
  <form>
    <label>Random Number:</label>
    <input type="text" name="random_number" value="<?php echo generateRandomNumber(); ?>" readonly>
    <br>
    <button type="submit">Generate Random Number</button>
  </form>
</body>
</html>
 
janaterrahmen said:
Please provide the required code
And if you need any modification I will help you


Code: 
<?php
function generateRandomNumber() {
    $part1 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part2 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part3 = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
    $part4 = str_pad(mt_rand(0, 999), 3, '0', STR_PAD_LEFT);
    return "{$part1}-{$part2}-{$part3}-{$part4}";
}

if (isset($_POST['generate'])) {
    $randomNumber = generateRandomNumber();
} else {
    $randomNumber = "";
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Generate Random Number</title>
</head>
<body>
    <form method="post">
        <label for="number">Random Number:</label>
        <input type="text" name="number" id="number" value="<?php echo $randomNumber; ?>" readonly><br><br>
        <input type="submit" name="generate" value="Generate">
    </form>
</body>
</html>
Click to expand...
What is your problem with this code exactly?

I would instead change the name of the input field to "randomNumber" to match the variable name or change the variable name to "number" to match the input field name.

Because now, you assign the generated random number to a variable named "$randomNumber". Other than that, this is a working code.
Also, you can check if the generate button was clicked and generated a random number, or if it's not, set the $randomNumber to an empty string.

PHP: 
$randomNumber = isset($_POST['generate']) ? generateRandomNumber() : "";
 
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