fopen() and hash_update_stream() are commonly used for handling file streams and calculating file hashes. When these two functions are used together, it’s important to focus on performance and security. This article will explore how to combine these functions in PHP to optimize both their performance and security.

stream_context_create(), fopen(), and stream_context_get_options() are functions commonly used to manipulate streams. Through these functions, developers can create, configure, and obtain context settings for file streams. Especially when requesting HTTP, using a combination of these functions gives you the flexibility to set HTTP request headers and get HTTP configuration options from the stream context.

Debugging is an important step when using PHP for database operations. mysqli::debug is a very useful function that can help developers output detailed debugging information. However, by default, debug information is output to the browser or log file. If we want to save this debug information to the specified file for subsequent analysis and viewing, we can combine mysqli::debug and fopen() to achieve this.

When working with XML files, it is unrealistic to load the entire file into memory at once if the file is very large (for example, hundreds of MB or even several GB). At this time, we can use PHP's xml_parse function to combine fopen and streaming reading to realize parsing while reading, thereby saving memory.