How to convert php array to utf8 encoding

In PHP development, we often need to perform data processing and conversion. Converting an array to UTF-8 format is a very common operation. This article will detail how to convert a PHP array to UTF-8 encoding.

1. Introduction to PHP arrays

Arrays in PHP are a very common data type that can store multiple values ​​and can access these values ​​based on subscripts. In PHP, an array can be one of the following three types:

1. Indexed array: The subscripts of the array are consecutive integers, starting from 0 and increasing.
2. Associative array: The subscript of the array is a string, used to access the value in the array.
3. Multidimensional array: The elements in the array are also an array.

In PHP, we can use the following syntax to define an array:

// 索引数组
$array = array('value1', 'value2', 'value3');

// 关联数组
$array = array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3');

// 多维数组
$array = array(
    array('value1', 'value2'),
    array('value3', 'value4')
);

2. UTF-8 encoding of PHP arrays

In PHP, We can use iconv or mb_convert_encoding function to UTF-8 encode the string. But if we need to UTF-8 encode the elements in the array, we need to traverse the array.

Let’s first look at how to convert a string into UTF-8 format:

// 使用iconv函数进行转换
$string = '中文字符';
$utf8_string = iconv('GBK', 'UTF-8', $string);

// 使用mb_convert_encoding函数进行转换
$utf8_string = mb_convert_encoding($string, 'UTF-8', 'GBK');

If we need to UTF-8 encode the elements in the array, we can use the following code:

// 遍历索引数组
foreach ($array as $key => $value) {
    $array[$key] = mb_convert_encoding($value, 'UTF-8', 'GBK');
}

// 遍历关联数组
foreach ($array as $key => $value) {
    $array[$key] = mb_convert_encoding($value, 'UTF-8', 'GBK');
}

// 遍历多维数组
function convertArray($array)
{
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            $array[$key] = convertArray($value);
        } else {
            $array[$key] = mb_convert_encoding($value, 'UTF-8', 'GBK');
        }
    }
    return $array;
}

$array = convertArray($array);

3. Summary

In this article, we introduced the basic knowledge of PHP arrays and explained in detail how to encode the elements in the array in UTF-8. These operations are very important both during development and when working with data. More importantly, we should learn to use the functions and syntax in PHP to improve development efficiency and code quality.

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