what is the protected mode in php
I Protected works only one inherited class know ,
In this code , the protected works in third class ,
Is It true or any mistake i made in my code ,
<?php
class sample_visibility{
public function my_first_public(){
$MSG = "THIS IS MY PUBLIC FUNCTION ";
return $MSG;
}
private function my_first_private(){
$MSG = "THIS IS MY PRIVATE FUNCTION ";
return $MSG;
}
protected function my_first_protected(){
$MSG = "THIS IS MY PROTECTED FUNCTION ";
return $MSG;
}
}
class sample_visibilit2 extends sample_visibility{
public function my_first_child_public(){
$MSG = "THIS IS MY CHILD PUBLIC FUNCTION ".$this->my_first_protected();
return $MSG;
}
}
class sample_visibilit3开发者_开发知识库 extends sample_visibility{
public function my_first_child_public_3(){
$MSG = "THIS IS MY CHILD PUBLIC FUNCTION ".$this->my_first_protected();
return $MSG;
}
}
$OBJ_CLASS_1 = new sample_visibility();
echo $OBJ_CLASS_1->my_first_public();
$OBJ_CLASS_3 = new sample_visibilit3();
echo $OBJ_CLASS_3->my_first_child_public_3();
?>
You have made no mistake in your code. Protected elements (members or functions) are accessible by children, grandchildren, (great-)*grandchildren. Any number of inheritances is ok. They are only "protected" from unrelated classes.
public - accessible anywhere
protected - derived classes only (any number of inheritances)
private - only accessible internally
Although your question is not very clear, your code is correct and will work.
Inside the classes sample_visibilit2
and sample_visibilit3
you can access my_first_protected()
, because both classes are subclasses of sample_visibility
.
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