When a class is defined by inheriting the existing function of a parent class then it is called inheritance.
Inheritance in PHP allows a class to inherit members from another class within same PHP program.
Let's take a simple example on inheritance in PHP.
<!DOCTYPE html>
<html>
<head>
<title>Inheritance Example in PHP</title>
</head>
<body>
<?php
class Myclass
{
public function displaying_function($argument_vl)
{
echo "Output :<b>".$argument_vl."</b><hr/>";
}
public function displaying_function_alone()
{
echo "This is PHP Inheritance Tutorial with Example<hr/>";
}
}
class Anotherclass extends Myclass
{
public function displaying_function($argument_vl)
{
echo "Another Output: <b>".$argument_vl."</b><hr/>";
}
}
$obj1 = new Myclass();
$obj2 = new Anotherclass;
$obj1->displaying_function('I am an argument value passed in displaying function in Myclass class');
$obj1->displaying_function_alone();
$obj2->displaying_function("I am also an argument value passed in displaying function but in Anotherclass class");
$obj2->displaying_function_alone();
?>
</body>
</html>
Below is the sample output of the above inheritance example
Here is another example which will demonstrates inheritance in PHP.
<!DOCTYPE html>
<html>
<head>
<title>Inheritance Example in PHP</title>
</head>
<body>
<?php
class Like
{
public $whatILike;
public function tellWhatULike()
{
return "I just like to read ".$this->whatILike." on CodesCracker";
}
}
class LikeAnother extends Like
{
public function tellWhatULike()
{
return "I just like to read ".$this->whatILike." on CodesCracker";
}
}
$objectLikeAnother = new LikeAnother();
echo $objectLikeAnother->tellWhatULike();
echo "<br/>";
$objectLikeAnother = new LikeAnother();
$objectLikeAnother->whatILike = "C++";
echo $objectLikeAnother->tellWhatULike();
echo "<br/>";
$objectLike = new Like();
echo $objectLike->tellWhatULike();
echo "<br/>";
$objectLike = new LikeAnother();
$objectLike->whatILike = "PHP";
echo $objectLike->tellWhatULike();
echo "<br/>";
?>
</body>
</html>
Here is the sample output of the above example code on inheritance in PHP.
