Php learning journey: static variables and methods

: This article mainly introduces the php learning journey: static variables and methods. if you are interested in the PHP Tutorial, please refer to it. Static keywords are used to modify attributes and methods. Static attributes, Static method.

The static method can only access static attributes, but cannot access non-static attributes. However, non-Static methodYou cannot use the this keyword to call a non-Static methodInstead, you must use the self: keyword and the non-Static methodCannot contain non-Static variables, GeneralStatic methodDo Not CallStatic method.

Static attributes, which are shared by all instances in the memory.

You can use the self: keyword to access the static members of the current class.

NonStatic methodCallStatic variables

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Static methodCallStatic variables

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NonStatic methodCallStatic method

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Static methodCall non-Static method(Actually, it is equivalentStatic methodChangesStatic method)

  '.$test::display_static();?>

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The above describes the php learning journey: static variables and methods, including static methods, static attributes, static variables, and hope to help those who are interested in PHP tutorials.