What is a custom function library? The function library is not a php syntax for defining functions, but a programming mode. Functions are the modules of structured programming and the core of code reuse. To better organize code, user-defined functions can be used in multiple files of the same project, generally, multiple user-defined functions are organized into the same file or multiple files. The files defined by these collection functions are the creation of the PHP function library. If you want to use the functions defined in these files in a PHP script, you need to use include (), include_once (... what is a custom function library? The function library is not a php syntax for defining functions, but a programming mode. Functions are the modules of structured programming and the core of code reuse. To better organize code, user-defined functions can be used in multiple files of the same project, generally, multiple user-defined functions are organized into the same file or multiple files. The files defined by these collection functions are the creation of the PHP function library. If you want to use the functions defined in these files in a PHP script, you need to use a function in include (), include_once (), require (), and require_once, load the function library file into the script program. Php uses the custom function libraries include () and require () to introduce the performance of The require () statement and include (), both including and running the specified file. The difference is that the include () statement reads and evaluates the file every time it executes the file.
1. Detailed introduction to the custom function library
Introduction: The function library is not a php syntax for defining functions, but a programming mode. Functions are the modules of structured programming and the core of code reuse. To better organize code, user-defined functions can be used in multiple files of the same project,
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