spl_autoload

Function name: spl_autoload()

Applicable version: PHP 5 >= 5.1.0, PHP 7

Function Description: The spl_autoload() function registers a custom automatic loading function to automatically load class files when using classes that have not yet been defined.

usage:

1. Define the automatic loading function: function myAutoload($className) { // Load the corresponding class file include_once $className . '.php'; }

2. Register the autoload function: spl_autoload_register('myAutoload');

Example: Suppose there is a class file named "MyClass.php", which is located in the current working directory.

In the above example, we define an automatic loading function "myAutoload", which automatically loads the corresponding class file when using an undefined class. We then register the autoload function to the autoload queue by calling the "spl_autoload_register" function. Finally, we create an instance of "MyClass" and call its methods.

Note that the function name "myAutoload" is customizable, just make sure to use the same function name when registering. In addition, the automatic loading function should load the corresponding class file according to the class name to achieve the correct automatic loading function.