如何从多维数组中获取随机数据?(复制)

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这个问题已经有了答案:

multi dimensional array in random order 4 answers
多维数组随机排列4个答案。

Is it possible to get random data from an array?

是否可以从数组中获取随机数据?

See My Array:

看到我的数组:

    
Array
(
    [0] => Array
        (
            [0] => My Data
            [1] => Airport
            [2] => Md
        )

    [1] => Array
        (
            [0] => Live in fear
            [1] => Science
            [2] => Sc
        )

    [2] => Array
        (
            [0] => State History
            [1] => Government
            [2] => MP
        )

    [3] => Array
        (
            [0] => Real Estate
            [1] => Other
            [2] => Property
        )

    [4] => Array
        (
            [0] => Real State
            [1] => Not Sure
            [2] => NoData
        )
)

I need this type of random output...

我需要这种随机输出…

Array
(
    [0] => Array
        (
            [0] => My Data
            [1] => Airport
            [2] => Md
        )

    [1] => Array
        (
            [0] => Real State
            [1] => Not Sure
            [2] => NoData
        )

    [2] => Array
        (
            [0] => My Data
            [1] => Airport
            [2] => Md
        )

    [3] => Array
        (
            [0] => State History
            [1] => Government
            [2] => MP

        )

    [4] => Array
        (
            [0] => Live in fear
            [1] => Science
            [2] => Sc

        )
)

3 个解决方案

#1

You could simply use shuffle()

您可以简单地使用shuffle()

bool shuffle ( array &$array )

bool shuffle(数组&$array)

This function shuffles (randomizes the order of the elements in) an array. It uses a pseudo random number generator that is not suitable for cryptographic purposes.

这个函数会打乱数组中的元素顺序。它使用一个伪随机数生成器，不适合加密目的。

shuffle($array); // Shuffles your array keys randomly every time.

#2

shuffle() will be a better option in getting out the random value from multi dimensional array.

shuffle()将是一个更好的选择，从多维数组中获取随机值。

Reference: http://php.net/manual/en/function.shuffle.php

参考:http://php.net/manual/en/function.shuffle.php

shuffle() Example:

洗牌()例子:

The shuffle() function randomizes the order of the elements in the array.

函数的作用是:随机化数组中元素的顺序。

This function assigns new keys for the elements in the array. Existing keys will be removed

这个函数为数组中的元素分配新的键。现有的密钥将被删除。

<?php
$my_array = array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow","e"=>"purple");

shuffle($my_array);
print_r($my_array);
?>

Output:

输出:

Array ( [0] => red [1] => yellow [2] => green [3] => blue [4] => purple )
//The Output will keep shuffling if you refresh the browser.

#3

Try the following shuffle function.Hope it would help you.

试试下面的shuffle功能。希望它能帮到你。

function shuffle_assoc($list) { 
  if (!is_array($list)) return $list; 

  $keys = array_keys($list); 
  shuffle($keys); 
  $random = array(); 
  foreach ($keys as $key) { 
    $random[] = $list[$key]; 
  }
  return $random; 
} 

$arr = array();
$arr[] = array('id' => 50, 'foo' => 'hello');
$arr[] = array('id' => 17, 'foo' => 'byebye');
$arr[] = array('id' => 19, 'foo' => 'foo');

print_r(shuffle_assoc($arr));

#1