# str_shuffle

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

str_shuffle — Randomly shuffles a string

### Description

str_shuffle ( string `$str` ) : string

str_shuffle() shuffles a string. One permutation of all possible is created.

Caution

This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(), random_bytes(), or openssl_random_pseudo_bytes() instead.

### Parameters

`str`

  The input string.

### Return Values

Returns the shuffled string.

### Changelog

Version | Description
--- | ---
7.1.0 | The internal randomization algorithm has been changed to use the » Mersenne Twister Random Number Generator instead of the libc rand function.

### Examples

Example #1 str_shuffle() example

`<?php
$str = 'abcdef';
$shuffled = str_shuffle($str);
// This will echo something like: bfdaec
echo $shuffled;
?>`

### See Also

- shuffle() - Shuffle an array
- rand() - Generate a random integer