Differences between:,-& amp; gt;, self, and $ this operators in PHP. When accessing the member variables or methods in the PHP class, if the referenced variables or methods are declared as const (defining constants) or static (declaring static), the operator must be used: when accessing the member variables or methods in the PHP class, if the referenced variables or methods are declared as const (defining constants) or static (declaring static), the operator must be used:: if the referenced variable or method is not declared as const or static, the operator-> must be used.
In addition, if you access const or static variables or methods from the inside of the class, you must use self-referenced. Otherwise, if the internal access from the class is not a const or static variable or method, then you must use the self-referenced $ this.
Declare (defining constants) or static (declaring static), you must use the operator :...
