Examples of extensions and inheritance usages of PHP classes _php tutorial

Examples of extensions and inheritance usages for PHP classes

The examples in this article describe the extension and inheritance usage of PHP classes. Share to everyone for your reference. Specific as follows:

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Class Thread { var $topic; Post Topic var $body; Post Content var $date; Post release time var $author; Post author function thread for initializing variables, etc. function Thread () { Initialize variables } function Send to submit a new post function Send () { To detect the legality of a variable and perform an insert operation to store the variable in the database } function edit for editing posts function Edit () { Perform update operation after checking the legality of variables store variables in the database } function Delete to delete a post function Delete () { When the author's permissions are detected, the relevant data is deleted from the database } } Class Mainthread extends Thread { var $id; Post Number var $board; The discussion area where the post is located var $allowreply; Whether to allow replies constructors, for initializing variables function Mainthread ($id, $board, $allowreply) { Used to initialize variables } function Send () { To detect the legality of a variable and perform an insert operation to store the variable in the database Parent::send (); The Send function that is used to call the base class } function Edit () { Perform update operation after checking the legality of variables store variables in the database Parent::edit (); The edit function to call the base class } } $th = new Thread; Create a new object if ($th instanceof thread)//If the object $th is of type thread, output Yes echo "Yes"; Else echo "No"; ?>

I hope this article is helpful to everyone's PHP programming.

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