How to disrupt an array in php

In PHP, the method of shuffling an array is very simple. PHP provides the shuffle() function to achieve this purpose.

The shuffle() function can randomly sort the array. This function randomly arranges the elements in the array and exchanges the positions of the array elements, but it does not change the key-value relationship in the original array.

The following is the basic syntax for using the shuffle() function to shuffle an array:

shuffle($array);

Among them, $array represents the name of the array to be shuffled. This function simply returns the randomly arranged array rather than mutating the array.

In order to better understand this function, you can look at the following code example:

$numbers = array(1,2,3,4,5);
shuffle($numbers);
print_r($numbers);

Output:

Array
(
    [0] => 4
    [1] => 1
    [2] => 2
    [3] => 5
    [4] => 3
)

In this example, a 5-number array is first created. array. Next, use the shuffle() function to shuffle the array. Finally, the print_r() function is used to output the scrambled array.

It should be noted that the shuffle() function does not return a value, it directly changes the order of the original array. If you want to preserve the order of the original array, you can copy the array before shuffling it.

The following is an example of using the shuffle() function after copying the array:

$numbers = array(1,2,3,4,5);
$shuffled_numbers = $numbers;
shuffle($shuffled_numbers);
print_r($numbers);
print_r($shuffled_numbers);

Output:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
)

Array
(
    [0] => 2
    [1] => 3
    [2] => 1
    [3] => 4
    [4] => 5
)

In short, it is very easy to use PHP's shuffle() function to perform operations on arrays. disrupt operations. This function is a very useful tool in many applications driven by random factors.

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