PHP learning array_rand() array random selection function

This article mainly talks about PHP's array_rand() array random value function, and attaches the code, which has certain reference value. Interested friends can learn it.

array_rand() function

The array_rand() function is to randomly remove one or more elements from the array.

　　 mixed array_rand(array $input [,int $num_req]);

array_rand() function accepts an input parameter and an optional parameter num_req. The input parameter is used to specify the accepted array, and num_req is used to specify the number of elements to be taken out. The default is 1. If only one element is taken out, array_rand() will return the key of a random element, otherwise it will return an array containing random keys.

The code is as follows:

<?php
    $input=array("科比","姚明","詹姆斯","艾佛森","基德");
    echo "<pre class="brush:php;toolbar:false">";
    echo "随机获取一个元素" . "<br/>";
    print_r(array_rand($input));
    echo "<br/>";
    echo "随机获取两个元素" . "<br/>" ;
    print_r(array_rand($input,2));
    echo "

"; /*运行结果： 随机获取一个元素 2 随机获取两个元素 Array ( [0] => 2 [1] => 3 ) */ ?>

The article ends here, I hope it will be helpful to you.

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