What are the differences between static, self, and $this in PHP?

The differences between static, self, and $this in php are: 1. [$this] represents a reference to the object, written in a non-static method in the class; 2. Self is different from this, it points to the class itself , does not point to any instantiated object; 3. static is generally used to access static variables and static methods in a class.

The differences between static, self, and $this in php are:

1,$thisRepresents a reference to an object. $this is written in a non-static method in a class. When the class is instantiated, whoever calls the method (usually an object call) $this represents a reference to the object.

name; } } $p = new Person(); $p2 = new Person(); $p->name = "小红"; $p2->name = "小明"; $p->getName(); // 小红 $p2->getName(); // 小明

2.selfis different from this. It points to the class itself and does not point to any instantiated object. Generally used to access static variables and static methods in a class, and are also methods written in the class. Which class self is written in indicates the reference of the class

      

      

      
3,staticGenerally used to access static variables and static methods in a class, which are also methods written in the class. When the class calls the method, static means that class (binding that class)
      
say(); // World $b->saySelf(); // Hello $b->sayStatic(); // World
      

       
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