PHP this, self, parent differences

PHP this, self, parent difference

1, this is a pointer to the current object such as: Other functions within the same class can be called with the this-> function name. 2, Self is a pointer to the current class general self used to point to a static variable in a class, also note that using self to call a static variable must use:: (Field Operation symbol) such as: Self:: $firstCount;      Using self to invoke a static variable 3, parent is a pointer to the parent class generally we use the parent to invoke the constructor of the parents class such as: Parent::__construct ("Pbphome");    The constructor for the parent class was called with parent

?

