PHP basic knowledge of object-oriented programming _php tutorial

What we're introducing to you today is aboutIn the following example, we illustrate the practical meaning and application method of object-oriented programming using PHP.

When we do a Web site with a database background, we will take into account that the program needs to be applied to different environments. Unlike other programming languages, in PHP, the operations database is a series of specific function functions (if you do not use the ODBC interface). This is highly efficient, but the package is not enough. If there is a unified database interface, then we can not make any changes to the program to apply to a variety of databases, so that the program's portability and cross-platform capabilities are greatly improved.

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

 
 

  
  

  
<  ? 
  
  

  
Class SQL
  
  

  
{
  
  

  
var $Driver; Actual operation of the database-driven subclass
  
  

  
var $connection; Shared Database connection variables
  
  

  
function Driverregister ($d)
  
  

  
{
  
  

  
if ($d! = "")
  
  

  
{
  
  

  
$ include_path  =  Ini_get ("Include_path"); 
  
  

  
$ Driverfile = $include _path. " /". $d.". PHP "; 
  
  

  
The drive's storage path must be set in the php.ini file include_path
  
  

  
if (file_exists ($DriverFile))//Find out if the driver is present
  
  

  
{
  
  

  
Include ($DriverFile);
  
  

  
$this- > Driver  =  New $d (); 
  
  

  
Generate the corresponding database driver class based on the driver name
  
  

  
return true;
  
  

  
}
  
  

  
}
  
  

  
return false; Registration Driver failed
  
  

  
}
  
  

  
Function Connect ($host, $user, $passwd, $database)//functions connected 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 functions
  
  

  
{
  
  

  
$this- > driver- > Close ($this->connection); 
  
  

  
}
  
  

  
function query ($QUERYSTR)//database string query functions
  
  

  
{
  
  

  
return $this- > driver- > query ($QUERYSTR, $this->connection); 
  
  

  
}
  
  

  
function GetRows ($res)//Find row
  
  

  
{
  
  

  
return $this- > driver- > getRows ($res); 
  
  

  
}
  
  

  
function Getrowsnum ($res)//Get line number
  
  

  
{
  
  

  
return $this- > driver- > Getrowsnum ($res); 
  
  

  
}
  
  

  
}
  
  

  
?   > 
 
 

I hope that the above introduction of the PHP object-oriented programming knowledge of the people are helpful.

http://www.bkjia.com/PHPjc/446417.html www.bkjia.com true http://www.bkjia.com/PHPjc/446417.html techarticle today we are going to introduce you to the following we have an example of the use of PHP object-oriented programming of the actual meaning and application methods. We usually do a database backstage ...

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