array_rand_PHP array_rand（）函数与示例

朱雀 2023-03-05 13:26 241阅读 0赞

array\_rand

## PHP array\_rand()函数 **(**PHP array\_rand() function**)** ##

**array\_rand() function** is used to get random keys from an array, it can be used to get single random key or array of the keys by specifying the number of random keys.

**array\_rand()函数**用于从数组中获取随机密钥，通过指定随机密钥的数量，可用于获取单个随机密钥或密钥阵列。

**Syntax:**

**句法：**

array_rand(array, [number]);

Here,

这里，

*  array is an input array, we have to get the random keys from it.
    
    数组是一个输入数组，我们必须从中获取随机键。
 *  number is the total number of random keys, it is used to get more than one random key i.e. an array of keys.
    
    number是随机密钥的总数，用于获取多个随机密钥，即一组密钥。

**Examples:**

**例子：**

Input:
        $arr = array("name" => "Amit", "age" => 21, "city" => "Gwalior");
       
        Output:
        random key: age

**PHP code:**

**PHP代码：**

<?php
        $arr = array("name" => "Amit", "age" => 21, "city" => "Gwalior");
        print("random key: " . array_rand($arr) ."\n");
        
        //generating an array of random keys
        print("array of random keys...\n");
        print_r(array_rand($arr, 2));
    ?>

**Output**

**输出量**

random key: age
    array of random keys...
    Array          
    (              
        [0] => age 
        [1] => city
    )

> 翻译自: [https://www.includehelp.com/php/array\_rand-function-with-example.aspx][https_www.includehelp.com_php_array_rand-function-with-example.aspx]

array\_rand

[https_www.includehelp.com_php_array_rand-function-with-example.aspx]: https://www.includehelp.com/php/array_rand-function-with-example.aspx