public, protected, and private Methods in PHP

By: Andi, Stig and Derick Emailed: 1731 times Printed: 2337 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

Access modifiers may also be used in conjunction with object methods, and the rules are the same:

  • public methods can be called from any scope.

  • protected methods can only be called from within one of its class methods or from within an inheriting class.

  • private methods can only be called from within one of its class methods and not from an inheriting class.

As with properties, private methods  may be redeclared by inheriting classes. Each class will see its own version of the method:

class MyDbConnectionClass {

public function connect()

{

$conn = $this->createDbConnection();

$this->setDbConnection($conn);

return $conn;

}

protected function createDbConnection()

{

return mysql_connect("localhost");

}

private function setDbConnection($conn)

{

$this->dbConnection = $conn;

}

private $dbConnection;

}

class MyFooDotComDbConnectionClass extends MyDbConnectionClass {

protected function createDbConnection()

{

return mysql_connect("foo.com");

}

}

This skeleton code example could be used for a database connection class. The connect() method is meant to be called by outside code. The createDbConnection() method is an internal method but enables you to inherit from the class and change it; thus, it is marked as protected. The setDbConnection() method is completely internal to the class and is therefore marked as private.

Note: When no access modifier is given for a method, public is used as the default.


PHP Home | All PHP Tutorials | Latest PHP Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.



Bookmark and Share

Comments(0)


Be the first one to add a comment

Your name (required):


Your email(required, will not be shown to the public):


Your sites URL (optional):


Your comments:



More Tutorials by Andi, Stig and Derick
Execution Lifetime of a PHP script
preg_split() and explode() in PHP
preg_replace() and preg_replace_callback() in PHP
preg_match(), function preg_match_all(), preg_grep() in PHP
tmpfile() in PHP
Renaming and Removing Files in PHP
Locking files in PHP
File Handling in PHP
Handling BLOB in PHP and MySQL
Using Sessions in PHP
Using Cookies in PHP
Using PEAR::Crypt_HMAC in PHP
Using HMAC Verification in PHP
Input Validation in PHP
__autoload() METHOD in PHP

More Tutorials in PHP
PHP code to import from CSV file to MySQL
PHP code to write to a CSV file from MySQL query
PHP code to write to a CSV file for Microsoft Applications
Convert XML to CSV in PHP
Password must include both numeric and alphabetic characters - Magento
PHP file upload (Large Files)
PHP file upload prompts authentication for anonymous users
PHP file upload with IIS on windows XP/2000 etc
Error: Length parameter must be greater than 0
Multiple File Upload in PHP using IFRAME
Resume or Pause File Uploads in PHP
Exception in module wampmanager.exe at 000F15A0 in Windows 8
Handling file locks in PHP
HTML table output using Nested for loops in PHP
Count occurrences of a character in a String in PHP

More Latest News
Most Viewed Articles (in PHP )
isset() function in PHP
preg_split() and explode() in PHP
Different versions of PHP - History and evolution of PHP
Parent: child process exited with status 3221225477 -- Restarting
A Basic Example using PHP in AWS (Amazon Web Services)
History and origin of PHP
PHP code to write to a CSV file from MySQL query
Anonymous functions as properties in Classes in PHP
Handling BLOB in PHP and MySQL
Locking files in PHP
Upload and Download files with FTP in PHP
Convert a hex string into a 32-bit IEEE 754 float number in PHP
Multiple File Upload in PHP using IFRAME
Password must include both numeric and alphabetic characters - Magento
Convert XML to CSV in PHP
Most Emailed Articles (in PHP)
PHP code to import from CSV file to MySQL
Convert XML to CSV in PHP
History and origin of PHP
The new keyword and constructors in PHP
public, protected, and private Methods in PHP
preg_split() and explode() in PHP
Opening a Remote File in PHP
Removing Duplicate Elements from an Array in PHP
PHP 5.1.4 INSTALLATION on Solaris 9 (Sparc)
Function to convert strings to strict booleans in PHP
Function to sort array by elements and count of element in PHP
Getting Started with PHP
.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable
Different versions of PHP - History and evolution of PHP
Traversing Arrays Using foreach in PHP