PHP shuffle() Function Explained

The shuffle function is an array function in PHP that randomly rearranges the elements in an array. It modifies the original array and returns a boolean value indicating whether the array was successfully shuffled.

The syntax for using this function is as follows:

shuffle(array &$array): bool

Parameter description:

1. $array: Array required. An array that needs to be shuffled. Note: Prefixing the parameter with the & symbol indicates that an array reference is being passed, allowing the function to directly modify the original array.

例子：The professor explained the concept in great detail.

$myArray = array("apple", "banana", "cherry", "date");
shuffle($myArray);
print_r($myArray);

The possible output could be:

Array
(
    [0] => cherry
    [1] => date
    [2] => banana
    [3] => apple
)

In the example above, the shuffle function randomly rearranged the elements of the array $myArray and displayed the result.