What is the function __construct used for?

by

__construct was introduced in PHP5 and it is the right way to define your, well, constructors (in PHP4 you used the name of the class for a constructor).
You are not required to define a constructor in your class, but if you wish to pass any parameters on object construction then you need one.

An example could go like this:

class Database {
  protected $userName;
  protected $password;
  protected $dbName;

  public function __construct ( $UserName, $Password, $DbName ) {
    $this->userName = $UserName;
    $this->password = $Password;
    $this->dbName = $DbName;
  }
}

// and you would use this as:
$db = new Database ( 'user_name', 'password', 'database_name' );

Everything else is explained in the PHP manual: click here

More Related Contents:

  1. Best way to do multiple constructors in PHP
  2. How to chain method on a newly created object?
  3. Returning a value in constructor function of a class
  4. How to call the constructor with call_user_func_array in PHP
  5. __construct() vs SameAsClassName() for constructor in PHP
  6. Constructor returning value?
  7. How do I get a PHP class constructor to call its parent’s parent’s constructor?
  8. What’s difference between __construct and function with same name as class has? [duplicate]
  9. PHP constructor to return a NULL
  10. Why does PHP allow “incompatible” constructors?
  11. Static class initializer in PHP
  12. PHP7 Constructor class name
  13. laravel – Can’t get session in controller constructor
  14. How to get the client IP address in PHP
  15. PHP ternary operator vs null coalescing operator
  16. Laravel 5.1 API Enable Cors
  17. How to login in with Curl and SSL and cookies
  18. json_decode returns JSON_ERROR_SYNTAX but online formatter says the JSON is OK
  19. Best way to get files from a dir filtered by certain extension in php [duplicate]
  20. PHP script not working in HTML file
  21. smtp configuration for php mail
  22. CakePHP remember me with Auth
  23. PHP mobile browser detection?
  24. Is there a pretty print for PHP?
  25. How to bind LIKE values using the PDO extension?
  26. How to display XML in HTML in PHP?
  27. Multi checkbox fields in Woocommerce backend
  28. strlen() php function giving the wrong length of unicode characters
  29. count() emitting an E_WARNING
  30. How do I convert an ISO8601 date to another format in PHP?

Leave a Comment