PHP独特的数字和更换？ [英] PHP unique numbers and replace?

问题描述

我们都知道在PHP中兰特（X，Y），但不会有唯一的编号工作。

We all know the rand(x,y) in PHP, but that would not work with unique numbers.

问题1：如何从1-52创建5的唯一号码，并把它们保存到一个数组

Question 1: how i can create 5 unique numbers from 1-52, and save them to an array?

可以说数组是：

$foo = array(1,2,3,4,5);

和我有$ foo的有一些这些数字的谢胜利数组：

and i have a secound array with a few of those numbers in $foo:

$egg = array(1,5,4);

问题2：我怎么能那么做，将采取和替换 $ foo的新的唯一的数字，除了每个数的函数从 $蛋的数量？
（这将使 2,3 新的独特的数字）。

Question 2: how can i then make a function that would take and replace every number in the $foo with new unique numbers, except the numbers from $egg? ( that would make 2,3 new unique numbers).

（又名：从 $蛋的值仍然存在于 $ foo的但其它值新）

(aka: the values from $egg are still there in $foo but every other value is new)

推荐答案

1问：

简单地创建 范围（）从那里你想要的独特的随机数。 洗牌（）的数组，然后采取 array_slice（） 从，就像这样：

Simply create the range() from where you want the unique random numbers. shuffle() the array and then take an array_slice() from it, like this:

<?php

    $range = range(1, 52);
    shuffle($range);
    $randomNumbers = array_slice($range, 0, 5);

    print_r($randomNumbers);

?>

可能的输出：

Array ( [0] => 25 [1] => 32 [2] => 7 [3] => 52 [4] => 35 )

2问题：

首先从两个阵列的区别与 和array_diff（ ） 。在此之后从范围创造尽可能多的随机数为 $差异有元素。但不包括它们是 $ foo的数组中了，所以你不要再重复获得

First get the difference from both arrays with array_diff(). After this create as many random numbers from the range as $diff has elements. But exclude all numbers which are in the $foo array already, so that you don't get duplicates again.

然后，您可以 array_combine（） 你想用随机数字来代替数字。

Then you can array_combine() the numbers which you want to replace with the random numbers.

和在此之后只需通过所有数组元素去 array_map（） 并检查是否有被更换或不是，如果是返还替换数量。

And after this simply go through all array elements with array_map() and check if it has to be replace or not, if yes return the replaced number.

<?php

    $range = range(1, 52);
    $foo = [1, 2, 3, 4, 5];
    $egg = [1, 5, 4];

    $diff = array_diff($foo, $egg);
    $range = array_diff($range, $foo);
    shuffle($range);

    $replacement = array_combine($diff, array_slice($range, 0, count($diff)));
    $foo = array_map(function($v)use($replacement){
        if(isset($replacement[$v]))
            return $replacement[$v];
        return $v;
    }, $foo);

    print_r($foo);

?>

可能的输出：

Array ( [0] => 1 [1] => 27 [2] => 10 [3] => 4 [4] => 5 )

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