What to do if php xmlhttprequest Chinese garbled characters

In PHP development, XMLHttpRequest is often used to transfer data between the client and the server. However, in the process of using XMLHttpRequest, you may encounter Chinese garbled characters, which will have a serious impact on the normal operation of the website.

XMLHttpRequest is a client-to-server communication technology based on the HTTP protocol. It can send and receive data to the server in the background without interrupting the user's operation. However, when using XMLHttpRequest to send Chinese data, garbled characters may occur due to incorrect encoding format. Here are some common processing methods.

Method 1: Unified encoding format

When using XMLHttpRequest to transmit Chinese data, the data must be encoded and converted in advance to ensure that the sent and received data formats are unified. For example, use the encodeURIComponent() method on the client to encode the data, and then use the urldecode() method on the server to decode it. This can avoid Chinese garbled characters.

Method 2: Set the request header

XMLHttpRequest can set the request header to specify the encoding format of sending and receiving data. By setting the Content-Type and Accept-Encoding headers, you can set the request header in the request and the encoding format of the data specified in the response. As shown below:

var xhr = new XMLHttpRequest();
xhr.open('POST', 'url', true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=UTF-8');
xhr.setRequestHeader('Accept-Encoding', 'gzip, deflate');
xhr.send('data');

Among them, Content-Type specifies the type of entity data sent in the request, and the character set of the entity data. Accept-Encoding is used to represent the data encoding method received by the client. By setting the request header, you can clearly specify the encoding format of the data to ensure the correct transmission of data.

Method 3: Use JSON format to transmit data

When using XMLHttpRequest to transmit data, you can consider using JSON format to transmit data. JSON can support Chinese characters, and it can easily convert complex The data structure is converted into a string for easy transmission. By setting the Content-Type of XMLHttpRequest to 'application/json', you can specify the format of the transmitted data as JSON.

var xhr = new XMLHttpRequest();
xhr.open('POST', 'url', true);
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(JSON.stringify(data));

By parsing the JSON string on the server side, the data structure can be obtained, thus avoiding the problem of Chinese garbled characters.

Summary

XMLHttpRequest is a very powerful and practical communication technology, but when using XMLHttpRequest for Chinese data transmission, the problem of Chinese garbled characters may occur. Methods to solve this problem mainly include unifying the encoding format, setting request headers, and using JSON format to transmit data. The specific selection needs to be based on the actual situation.

Regarding the encoding format, pay attention to unifying the encoding formats of the client and server to ensure that the transmitted data will not be garbled.

At the same time, when using XMLHttpRequest, we also need to pay attention to the security of the request and the compatibility of the corresponding browser, which need to be carefully considered during development.

The above is the detailed content of What to do if php xmlhttprequest Chinese garbled characters. For more information, please follow other related articles on the PHP Chinese website!