[Summary] Common HTTP request headers in php

In PHP, the HTTP request header refers to some metadata information added to the first line of the request when sending an HTTP request. These header information can help the server handle the request correctly and tell the server some additional information, such as browser and operating system type, content type, and client location information.

Therefore, HTTP request headers are very important and provide the basis for effective data transmission. In PHP, the commonly used HTTP request headers include the following:

1. Accept-Language: Indicates the language type accepted by the client.
2. User-Agent: Indicates the client that sent the request (such as browser platform, version, operating system, etc.).
3. Host: Indicates the requested host name and port number.
4. Content-Type: Indicates the type of request body so that the server can process it separately according to the data type.
5. Content-Length: Indicates the length of the request body (number of bytes).
6. Accept-Encoding: Indicates the data compression format that the client can handle.
7. Connection: Indicates whether the client wishes to maintain a connection to the server.
8. Referer: Indicates the webpage reference address where the request is initiated.

The above are some common options in HTTP request headers. Their different application scenarios are as follows:

Accept-Language and User-Agent are mainly used to determine the language and version information of the client and display appropriate content.

Host is used to indicate the host accessed by the server and the port number when using multiple virtual hosts.

Content-Type and Content-Length are very important in POST and PUT requests to indicate the type and content length of the request body so that the server can process the request correctly.

Accept-Encoding can be used to choose the best compression method between client and server to increase transfer speed.

The Connection header is used to determine whether to maintain a continuous connection with the server after the client requests.

Referer is used to tell the server which page the request was initiated from so that the server can handle the request appropriately.

Overall, in Web development, HTTP request headers are a very important link, especially in the development process of API interfaces. Understanding these request headers can better design API interfaces, optimize server performance, and improve user experience. The HTTP request header in PHP is the foundation and core for development, so we should master and learn more deeply.

The above is the detailed content of [Summary] Common HTTP request headers in php. For more information, please follow other related articles on the PHP Chinese website!