In inheritance system, Maybe we need to use some properties/methods in parent/other classes.
to undrestand this, look at this example:
class Father
$name = 'the father'
endclass
class Child < Father
$name = 'the child'
endclass
$a = Child()
println($a->name)
output:
the child
In the above example, the name property points to Child class name. But how we can access to Father name? We should use super method:
class Father
$name = 'the father'
endclass
class Child < Father
$name = 'the child'
endclass
$a = Child()
println($a->name)
println($a->super('Father')->name)
output:
the child
the father
Also this is useful for methods:
class Father
func hello
println('Father: hello!')
endfunc
endclass
class Child < Father
func hello
println('Child: hello!')
endfunc
endclass
$a = Child()
$a->hello()
$a->super('Father')->hello()
output:
Child: hello!
Father: hello!
Also you can use this for MORE THAN ONE LAYER:
class A
func hello
println('A: hello')
endfunc
endclass
class B < A
func hello
println('B: hello')
endfunc
endclass
class C < B
func hello
$this->super('A')->hello()
$this->super('B')->hello()
println('C: hello')
endfunc
endclass
$c = C()
$c->hello()
output:
A: hello
B: hello
C: hello
Also sometimes we are using some methods in parent classes which they need to use self methods/props.
for understand it, look at this example:
class Father
func foo
$this->super('Father')->bar() # not child's `bar`
endfunc
endclass