How to form a new array with every three elements in php
In PHP programming, we often need to operate arrays. One of the common tasks is to split a large array into multiple small arrays according to certain rules, which can facilitate our data processing and display. In this article, we will introduce how to use PHP to form a new array every three elements of an array.
1. Use the array_chunk function
The array_chunk function is a built-in function in PHP. It can split an array into multiple sub-arrays according to the specified size and return a new array composed of these sub-arrays. array. Therefore, we can use the array_chunk function to split the original array into multiple sub-arrays for every three elements. The sample code is as follows:
<?php $original_array = array(1,2,3,4,5,6,7,8,9,10,11,12); $new_array = array_chunk($original_array, 3); print_r($new_array); ?>
After running the above code, the output result is:
Array ( [0] => Array ( [0] => 1 [1] => 2 [2] => 3 ) [1] => Array ( [0] => 4 [1] => 5 [2] => 6 ) [2] => Array ( [0] => 7 [1] => 8 [2] => 9 ) [3] => Array ( [0] => 10 [1] => 11 [2] => 12 ) )
It can be seen that the original array was successfully split into four sub-arrays based on every three elements, and each sub-array contains three elements.
2. Use for loop implementation
In addition to using ready-made functions, we can also manually write code to split the original array into multiple sub-arrays for every three elements. The following is an implementation method based on a for loop:
<?php $original_array = array(1,2,3,4,5,6,7,8,9,10,11,12); $new_array = array(); for($i = 0; $i < count($original_array); $i += 3) { $sub_array = array_slice($original_array, $i, 3); array_push($new_array, $sub_array); } print_r($new_array); ?>
In the above code, we use a for loop to traverse the original array, taking out three elements each time and putting them into a new array as subarrays. Among them, the array_slice function is used to take out the 3 elements starting from $i, and the array_push function is used to add the subarray to the new array.
Compared with the array_chunk function, this method is more controllable and suitable for some special scenarios. For example, if we need to add a specific element at the end of each sub-array, we can modify the steps of the for loop. It will take a long time to achieve.
3. Summary
In PHP, forming a new array with every three elements of an array can be achieved using the array_chunk function and a for loop. We can choose the appropriate method according to actual needs to process and display data more efficiently.
The above is the detailed content of How to form a new array with every three elements in php. For more information, please follow other related articles on the PHP Chinese website!

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