php获取两个不同的随机数组元素 [英] php get two different random array elements

问题描述

来自数组

 $my_array = array('a','b','c','d','e');

我想获得两个不同的随机元素.

I want to get two DIFFERENT random elements.

使用以下代码:

 for ($i=0; $i<2; $i++) {
    $random = array_rand($my_array);  # one random array element number
    $get_it = $my_array[$random];    # get the letter from the array
    echo $get_it;
 }

有可能得到两次相同的字母.我需要防止这种情况.我想总是得到两个不同的数组元素.有人能告诉我怎么做吗?谢谢

it is possible to get two times the same letter. I need to prevent this. I want to get always two different array elements. Can somebody tell me how to do that? Thanks

推荐答案

你总是可以删除第一次选择的元素，然后你就不会再选择它.如果您不想修改数组，请创建一个副本.

You could always remove the element that you selected the first time round, then you wouldn't pick it again. If you don't want to modify the array create a copy.

 for ($i=0; $i<2; $i++) {
    $random = array_rand($my_array);  # one random array element number
    $get_it = $my_array[$random];    # get the letter from the array
    echo $get_it;

    unset($my_array[$random]);
 }

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