How to convert a php string into a two-dimensional character array

In PHP, there are many ways we can convert a string into a two-dimensional array of characters. The following are two of the methods:

Method 1: Use the str_split function

The str_split function in PHP can split a string into a character array. We can use this function to convert a string into a two-dimensional character array.

Sample code:

<?php
$str = "hello world";
$chars = str_split($str);

//将字符数组转化为二维数组
$charArr = array();
for($i=0;$i<count($chars);$i++){
    $charArr[$i][0] = $chars[$i];
}

print_r($charArr);
?>

Run result:

Array
(
    [0] => Array
        (
            [0] => h
        )

    [1] => Array
        (
            [0] => e
        )

    [2] => Array
        (
            [0] => l
        )

    [3] => Array
        (
            [0] => l
        )

    [4] => Array
        (
            [0] => o
        )

    [5] => Array
        (
            [0] =>  
        )

    [6] => Array
        (
            [0] => w
        )

    [7] => Array
        (
            [0] => o
        )

    [8] => Array
        (
            [0] => r
        )

    [9] => Array
        (
            [0] => l
        )

    [10] => Array
        (
            [0] => d
        )

)

Method 2: Use the mb_str_split function

In addition to the str_split function, PHP also provides the mb_str_split function, Converts a multibyte string to a character array.

Sample code:

<?php
$str = "你好，世界！";
$chars = mb_str_split($str);

//将字符数组转化为二维数组
$charArr = array();
for($i=0;$i<count($chars);$i++){
    $charArr[$i][0] = $chars[$i];
}

print_r($charArr);
?>

Running result:

Array
(
    [0] => Array
        (
            [0] => 你
        )

    [1] => Array
        (
            [0] => 好
        )

    [2] => Array
        (
            [0] => ，
        )

    [3] => Array
        (
            [0] => 世
        )

    [4] => Array
        (
            [0] => 界
        )

    [5] => Array
        (
            [0] => ！
        )

)

Finally, no matter which method you use, don’t forget to use a loop to convert the character array into a two-dimensional character array . In this way, we can easily process and operate strings.

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