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PHP Inheritance
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.
PHP Inheritance Example
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.

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