How to Generate Unique Random Numbers Within a Specific Range in PHP?

Generating Unique Random Numbers within a Range

Creating a function to generate unique random numbers within a specified range is a common task in programming. Here's a more optimized alternative to the given code:

function uniqueRandomNumbersWithinRange($min, $max, $quantity) {
    $numbers = range($min, $max);
    shuffle($numbers);
    return array_slice($numbers, 0, $quantity);
}

This function takes three parameters:

• $min: The minimum value of the range
• $max: The maximum value of the range
• $quantity: The number of unique random numbers to generate

It works by creating an array containing all numbers in the specified range and then shuffling the array. The array_slice() function is then used to extract the specified number of unique random numbers from the shuffled array.

Example:

$numbers = uniqueRandomNumbersWithinRange(1, 20, 5);
print_r($numbers);

This will output an array of 5 unique random numbers within the range of 1 to 20, for example:

Array
(
    [0] => 6
    [1] => 17
    [2] => 14
    [3] => 19
    [4] => 12
)

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