How to convert one-dimensional array to two-dimensional array in php

In PHP, you can use the array_chunk() function to convert a one-dimensional array into a two-dimensional array. The function of this function is to split the array. It can split an array into multiple array blocks; the syntax format is "array_chunk ($arr,count($arr)/2)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use array_chunk () function to convert a one-dimensional array into a two-dimensional array.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array("Volvo","BMW","Toyota","Honda","Mercedes","Opel");
echo "原一维数组：";
var_dump($arr);

$chunk=array_chunk($arr,count($arr)/2);
echo "将一维数组转为二维数组：";
var_dump($chunk);
?>

Explanation:

array_chunk() function can To split an array into multiple array blocks, the syntax is as follows:

array array_chunk ( array $arr , int $size [, bool $preserve_keys = false ] )

Parameter description:

• arr represents the array to be split;

• size represents the number of elements of the divided sub-array;

• preserve_keys represents whether to retain the original key names in the arr array. The default is false, that is, not retained, split Each subsequent sub-array will use a new numeric index starting from 0; if set to true, the original key names in arr will be retained.

array_chunk() will split the arr array into multiple sub-arrays, and the number of elements in each sub-array is determined by size. The last subarray may have less than size elements.

Return value: Returns a multi-dimensional array composed of divided sub-arrays.

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