PHP converts Chinese character string into array

PHP, as a very powerful programming language, has a wealth of string manipulation functions for developers to use. During development, we sometimes need to convert strings containing Chinese characters into array format for subsequent data processing. This article will introduce how to use functions in PHP to convert Chinese character strings into arrays.

1. Convert the string to Unicode encoding

Before converting the Chinese character string to an array, we need to first convert it to Unicode encoding format. We can use the mb_convert_encoding() function in PHP to achieve this step.

Sample code:

$str = '中文字符串';
$unicode_str = mb_convert_encoding($str, 'UCS-2LE', 'UTF-8');

In the above code, $str is the Chinese character string that needs to be converted to Unicode encoding, UCS-2LE is Target encoding format, UTF-8 is the source encoding format. After executing the above code, the obtained $unicode_str is a string in Unicode encoding format.

2. Convert the Unicode encoded string into an array

Next, we need to convert the Unicode encoded string into an array. We can use the unpack() function in PHP to convert it into an array.

Sample code:

$str = '中文字符串';
$unicode_str = mb_convert_encoding($str, 'UCS-2LE', 'UTF-8');
$unicode_arr = unpack('S*', $unicode_str);

In the above code, $unicode_arr is the converted array, each element of which represents the Unicode encoding of a Chinese character. We can use a loop structure to convert it back to a Chinese character string. The sample code is as follows:

$str = '中文字符串';
$unicode_str = mb_convert_encoding($str, 'UCS-2LE', 'UTF-8');
$unicode_arr = unpack('S*', $unicode_str);

$str_arr = array();
foreach($unicode_arr as $code){
    $str_arr[] = mb_convert_encoding(pack('S', $code), 'UTF-8', 'UCS-2LE');
}

print_r($str_arr);

In the above code, $str_arr is the converted Chinese character string. As you can see, we used the pack() function to parse the Unicode encoding into raw binary data and used the mb_convert_encoding() function to perform encoding conversion, and finally obtained the Chinese character format as an array. string.

Summary

PHP provides many functions to operate strings, and we can easily convert Chinese character strings into array format. In actual development, it is necessary to choose a suitable method to process strings according to specific needs and situations.

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