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This article mainly explains "PHP object-oriented programming how to encapsulate objects", the content of the explanation is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "PHP object-oriented programming how to encapsulate objects" bar!

What we introduce to you today is about PHP object-oriented programming, so that beginners of the PHP language have a deeper understanding of PHP. Object-oriented programming (OOP) is one of our basic programming skills, and PHP4 provides good support for OOP. How to use the idea of OOP to carry on the advanced programming of PHP is very meaningful for improving the programming ability of PHP and planning the Web development framework.

Let's illustrate the practical significance and application method of using PHP object-oriented programming through an example.

When we do a website with a database background, we usually consider that the program needs to be suitable for different application environments. Unlike other programming languages, in PHP, the database is operated by a series of specific functions (if you don't use the ODBC interface). Although this is very efficient, the encapsulation is not enough. If there is a unified database interface, then we can apply to a variety of databases without any changes to the program, so that the portability and cross-platform ability of the program are greatly improved.

The completion of PHP object-oriented programming requires object encapsulation, that is, writing classes. We can simply encapsulate the database by generating a new SQL class. For example:

< ? class SQL { var $Driver; //实际操作的数据库驱动子类 var $connection; //共用的数据库连接变量 function DriverRegister($d) { if($d!="") { $include_path = ini_get("include_path"); $DriverFile = $include_path."/".$d.".php"; //驱动的存放路径必须在PHP.ini文件中设定的INCLUDE_PATH下 if( file_exists( $DriverFile)) //查找驱动是否存在 { include($DriverFile); $this->

Driver = new $d (); / / generate the corresponding database driver class return true;}} return false; / / failed to register driver} function Connect ($host,$user,$passwd,$database) / / function to connect to the database {$this- > Driver- > host=$host; $this- > Driver- > user=$user; $this- > Driver- > passwd=$pas swd; $this- > Driver- > database=$d atabase; $this- > connection = $this- > Driver- > Connect () } function Close () / close database function {$this- > Driver- > close ($this- > connection);} function Query ($queryStr) / / database string query function {return $this- > Driver- > query ($queryStr,$this- > connection);} function getRows ($res) / / find lines {return $this- > Driver- > getRows ($res);} function getRowsNum ($res) / / get line number {return $this- > Driver- > getRowsNum ($res) Thank you for reading. The above is the content of "how to encapsulate objects in PHP object-oriented programming". After the study of this article, I believe you have a deeper understanding of how to encapsulate objects in PHP object-oriented programming, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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