Static functions are functions associated with the class itself and can be accessed without creating an instance. Syntax: static function functionName() {}; Access method: Class name::static function name(); Advantages: Improved efficiency, reusability, and concise code; Notes: Non-static member variables cannot be accessed. When using static variables, cautious.
#How to create a PHP static function?
What is a static function?
Static functions are functions associated with the class itself, which can be accessed without creating an instance of the class. They are typically used for utility functions or auxiliary operations and can be used without instantiating the class.
Syntax
The syntax for declaring a static function is as follows:
static function functionName() {}
For example:
class MyClass { static function getGreeting() { return "Hello World!"; } }
Accessing static functions
Unlike non-static methods, static functions can be accessed directly through the class name without creating an instance.
$greeting = MyClass::getGreeting(); // Hello World!
Practical case
1. Create a utility function
Create a static function to check whether the string is Empty:
class StringHelper { static function isEmpty($string) { return empty($string); } }
2. Use static function
In another script file, you can use this function to check whether the string is empty:
$isEmpty = StringHelper::isEmpty($myString);
Advantages
Using static functions has some advantages:
Note
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