PHP中如何随机打乱多维数组内[title][link]与[content][excerpt]分组

To achieve your goal of randomly shuffling the pairing between [title][link] groups and [content][excerpt] groups from your original array, follow these straightforward steps:

Step 1: Split the Original Array into Two Separate Groups #

First, we'll extract the title-link pairs and excerpt-content pairs into their own distinct arrays. This lets us handle each group independently before recombining them randomly.

// Your original array (corrected to valid PHP syntax)
$originalArray = [
    [
        'title' => 'Title 0',
        'link' => 'Link 0',
        'excerpt' => 'Excerpt 0',
        'content' => 'Content 0'
    ],
    [
        'title' => 'Title 1',
        'link' => 'Link 1',
        'excerpt' => 'Excerpt 1',
        'content' => 'Content 1'
    ],
    [
        'title' => 'Title 2',
        'link' => 'Link 2',
        'excerpt' => 'Excerpt 2',
        'content' => 'Content 2'
    ]
];

// Extract title-link pairs
$titleLinkGroups = array_map(function($item) {
    return [
        'title' => $item['title'],
        'link' => $item['link']
    ];
}, $originalArray);

// Extract excerpt-content pairs
$excerptContentGroups = array_map(function($item) {
    return [
        'excerpt' => $item['excerpt'],
        'content' => $item['content']
    ];
}, $originalArray);

Step 2: Shuffle One of the Groups #

Next, we shuffle either the title-link or excerpt-content array. Shuffling just one group ensures we get a random pairing without reusing any pairs (as long as both arrays are the same length, which they are in your case).

// Make a copy of the excerpt-content array to avoid modifying the original
$shuffledExcerptContent = $excerptContentGroups;
// Shuffle the copied array in-place
shuffle($shuffledExcerptContent);

Step 3: Recombine the Shuffled Groups #

Finally, merge each title-link pair with the corresponding (now shuffled) excerpt-content pair to create your final randomized array.

$finalShuffledArray = array_map(function($tl, $ec) {
    return array_merge($tl, $ec);
}, $titleLinkGroups, $shuffledExcerptContent);

Example Output #

After running this code, your $finalShuffledArray might look something like this (the exact pairing will vary each time due to randomness):

Array(
    [0] => Array(
        [title] => 'Title 0',
        [link] => 'Link 0',
        [excerpt] => 'Excerpt 2',
        [content] => 'Content 2'
    ),
    [1] => Array(
        [title] => 'Title 1',
        [link] => 'Link 1',
        [excerpt] => 'Excerpt 0',
        [content] => 'Content 0'
    ),
    [2] => Array(
        [title] => 'Title 2',
        [link] => 'Link 2',
        [excerpt] => 'Excerpt 1',
        [content] => 'Content 1'
    )
)

Key Notes #

• No Duplicate Pairings: Since we're shuffling one array and merging index-by-index, each title-link pair will be matched with a unique excerpt-content pair (assuming your original array has no duplicate entries).
• Preserve Original Data: By making a copy of the excerpt-content array before shuffling, we keep your original array intact if you need it later.
• Randomness: PHP's shuffle() function uses a pseudo-random number generator, so you'll get a different result each time you run the code.

内容的提问来源于stack exchange，提问作者pattygeek