Chinese garbled characters in php array

PHP is a popular programming language, widely used especially in web development. Arrays are one of the most commonly used data structures in PHP and are used to store and manipulate data. However, when it comes to arrays containing Chinese characters, you may encounter garbled characters. In this article, we will explore how to solve the problem of Chinese garbled characters in PHP arrays.

1. UTF-8 encoding

First, we need to understand the concept of character encoding. Character encoding is a standardized way of mapping characters to binary values. UTF-8 is a commonly used character encoding that supports all Unicode characters and is backwards compatible with ASCII. In PHP, strings and arrays are stored as sequences of bytes. If we use UTF-8 encoding to store Chinese characters, it will be stored in 3 bytes. If we use other encoding like GBK, then Chinese characters will be stored in 2 bytes. Therefore, ensuring the correct character encoding is used is the key to solving the problem of Chinese garbled characters in PHP arrays.

2. Set character encoding

In PHP, we can use the header() function to set HTTP header information, including character encoding. For example, the following code will set the character encoding to UTF-8:

header('Content-type:text/html;charset=utf-8');

Before setting the character encoding, Please make sure that no response content is output. Otherwise, setting the character encoding will have no effect.

3. Process Chinese characters before using arrays

Before using arrays, we need to ensure that all Chinese characters have been processed correctly. Specifically, we need to use the mb_convert_encoding() function to convert strings of different encodings to UTF-8 encoding. For example, assuming we have an array $gbk_array of strings encoded in GBK, we can convert them to UTF-8 encoded string arrays using the following code:

$utf8_array = array_map(function($item) {

return mb_convert_encoding($item, 'UTF-8', 'GBK');

}, $gbk_array);

4. Use JSON encoding

JSON is a lightweight data exchange format that can be easily Pass data between different programming languages. In PHP, we can use the json_encode() function to encode an array into a JSON-formatted string. JSON encoding uses UTF-8 encoding to store character data. Therefore, using JSON encoding can ensure that Chinese characters will not be garbled. For example, the following code encodes the $utf8_array array into a JSON-formatted string:

$json_str = json_encode($utf8_array);

When using JSON encoding, you need to pay attention to the following points:

• If the array contains objects or other complex data types, please ensure that these data types are also UTF-8 encoded.
• When using the json_encode() function, please ensure that the data type passed is an array or object. If a string or other data type is passed, JSON encoding may fail or an exception may occur.

5. Output JSON data

Finally, we need to send the JSON data to the client. In PHP, we can use the header() function to set HTTP header information, including Content-Type and Content-Length. For example, the following code will set the HTTP response header and output JSON data:

header('Content-Type:application/json;charset=utf-8');
header('Content-Length:' .strlen($json_str));
echo $json_str;

When outputting JSON data, you need to pay attention to the following points:

• Use the header() function to set the HTTP header information, please make sure before outputting any response content.
• When using the echo statement to output JSON data, please ensure that no other response content is output.

Summary

In this article, we introduced how to solve the problem of Chinese garbled characters in PHP arrays. First, we need to understand the concept of character encoding, and then set the correct character encoding. Next, we need to process the Chinese characters before using the array to ensure that they have been converted to UTF-8 encoding. Finally, we use JSON encoding to encode the array into a JSON-formatted string and send it to the client. By following these guidelines, we can avoid the problem of Chinese garbled characters in PHP arrays.

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