随机排列除前三个元素外的数组

Question

我在 PHP 中有一个数组：

Array (
    [0] => Red
    [1] => Green
    [2] => Blue
    [3] => Yellow       
    [4] => Purple
    [5] => Orange
    [6] => Brown )

除了前三个元素（[0][1][2] 应保持在同一位置）之外，我希望此数组被打乱顺序。例如：

Array (
    [0] => Red
    [1] => Green
    [2] => Blue
    [3] => Brown        
    [4] => Yellow
    [5] => Purple
    [6] => Orange )

我知道如何用 shuffle( $array ); 打乱整个数组，但我需要建议如何不打乱该数组的前三个元素。谢谢！

Answer 1

这是你可以做的：

$a=array("red","green","blue","yellow","brown");
$partA = array_slice($a,0,3);
$partB = array_slice($a,3,sizeof($a));
shuffle($partB);
$result = array_merge($partA, $partB);
print_r($result);

随机排列除前三个元素外的数组

Shuffle array except for the first three elements

php

arrays

shuffle