How to solve php json_encode() Chinese transcoding

PHP is a programming language very commonly used in web development, which supports formatting data into JSON format, including Chinese characters. However, sometimes when using the json_encode() function in PHP, there will be a problem that Chinese characters are garbled. This article will discuss how to avoid Chinese character encoding problems when using PHP's json_encode() function.

What is the json_encode() function in JSON and PHP?

JSON (JavaScript Object Notation) is a lightweight data exchange format that is easy to read and write. It is widely used in data exchange between web applications, and the json_encode() function in PHP can format PHP variables into JSON format for easy transmission on the web.

For example, if there is a PHP variable named "person", you can format it into JSON format through the following code:

$person = array(
  'name' => '张三',
  'age' => 20,
  'gender' => '男'
);

$json_person = json_encode($person);

echo $json_person;

The output result is:

{"name":"张三","age":20,"gender":"男"}

This is a basic JSON object.

json_encodeChinese character encoding problem

When using the json_encode() function in PHP to format a string with Chinese characters into JSON format, sometimes it occurs Incorrect Chinese character encoding.

For example, format the following PHP array with Chinese characters into JSON format:

$data = array(
  'name' => '张三',
  'age' => 20,
  'gender' => '男'
);

$json_data = json_encode($data);

echo $json_data;

The output result is:

{"name":"\u5f20\u4e09","age":20,"gender":"\u7537"}

As you can see, in the output JSON In the string, Chinese characters are converted into Unicode encoding. This is because in JSON format, strings must be represented using Unicode encoding.

However, this encoding method is not convenient to read and use in some cases. Therefore, we need a way to solve it.

Solution

In PHP, we can use the second parameter of the json_encode() function to set the JSON output options. In this parameter, we can set the JSON_UNESCAPED_UNICODE option so that Chinese characters can be correctly output to JSON.

$data = array(
  'name' => '张三',
  'age' => 20,
  'gender' => '男'
);

$json_data = json_encode($data, JSON_UNESCAPED_UNICODE);

echo $json_data;

The output result is:

{"name":"张三","age":20,"gender":"男"}

This way you can avoid Chinese character encoding problems and easily use JSON data in web applications.

Other issues with JSON encoding

In addition to Chinese character encoding issues, the json_encode() function also has some other issues, for example, if the PHP variable contains special characters For example, "\" may cause escaping errors, etc. In order to avoid these problems, we also need to use other Json transcoding related functions or methods to process JSON data.

Summary

When writing web applications, using JSON format for data exchange is a common method, and using the json_encode() function in PHP can Conveniently format PHP variables into JSON format. During the above process, we may encounter Chinese character encoding problems, which can be avoided by adding the JSON_UNESCAPED_UNICODE option when calling the json_encode() function. However, it is not enough to solve the problem of Chinese character encoding. We also need to use other methods to deal with other possible problems to ensure reliability and stability.

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