This article provides an in-depth explanation of the PHP link() function, detailing how to create hard links and exploring the core concepts, syntax, return values, and practical use cases.

In PHP, highlight_file() and file_get_contents() are two commonly used functions for reading and displaying file content. When used together, they can conveniently show PHP file source code while maintaining syntax highlighting and allowing for flexible control over the content displayed.

In PHP, reading file content is a very common operation. The md5_file() function and the file_get_contents() function are both common functions for processing files, but their uses and performance differences are significant. This article will analyze in detail the differences and advantages and disadvantages of these two functions when reading files, and help you choose the right function to complete different tasks.

The header() function is used to send raw HTTP header information. If you want to redirect the user's request to another page, you can use the Location HTTP header. The basic syntax is as follows:

The file_get_contents() function is used to read files or get content from a URL. When you need to request remote resources through the HTTP protocol, file_get_contents() can combine a stream context to set the context options for the request. We can use the stream_context_get_options() function to view the configuration information of the current stream context, and then understand how the request is sent.

xml_parse and file_get_contents are two commonly used functions that parse XML data and obtain files from remote URLs, respectively. Today we will discuss how to combine these two functions to parse a remote XML file. Suppose we get data from an online XML file and process it.