The Performance Impact of Backslash Prefix in PHP Function Calls

2023/08/29

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The article discusses the use of backslashes in PHP function calls and its impact on performance. It explains that the backslash prefix is a micro-optimization technique that improves the performance of PHP applications. The article also introduces the concept of namespaces in PHP and how they are used to organize code. It explains that by adding a backslash before a function call, developers are telling the interpreter to search for the function directly in the root namespace, where most of the built-in functions reside. The article further explores the concept of opcode, the intermediate language that the PHP interpreter converts code to before execution. It demonstrates the difference in opcodes with and without the backslash prefix. Additionally, the article mentions that certain built-in functions can benefit even more from the backslash prefix. Overall, the article provides valuable insights for PHP developers looking to optimize their code and improve performance.