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Posted By

osccar on 03/20/12


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class data


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leond


DataObject class

 / Published in: PHP
 

Abstract class from which other classes can be derived to handle database access and data retrieval. Constants for database connection (DBDSN, DBUSERNAME, etc.) must be set in another php file (eg. config.php)

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  1. abstract class DataObject
  2. {
  3.   protected $data = array();
  4.  
  5.   public function __construct( $data )
  6.   {
  7.     foreach ( $data as $key => $value ) {
  8.         if ( array_key_exists( $key, $this->data ) )
  9.           $this->data[$key] = $value;
  10.     }
  11.   }
  12.  
  13.   public function getValue( $field )
  14.   {
  15.     if ( array_key_exists( $field, $this->data ) )
  16.       return $this->data[$field];
  17.     else
  18.       exit( "Field not found" );
  19.   }
  20.  
  21.   public function getValueEncoded( $field )
  22.   {
  23.     return htmlspecialchars( $this->getValue( $field ) );
  24.   }
  25.  
  26.   protected function connect()
  27.   {
  28.     try {
  29.       $conn = new PDO( DB_DSN, DB_USERNAME, DB_PWD );
  30.       $conn->setAttribute( PDO::ATTR_PERSISTENT, TRUE );
  31.       $conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
  32.     }
  33.     catch ( PDOException $e) {
  34.       exit( 'Connection failed: '. $e->getMessage() );
  35.     }
  36.  
  37.     return $conn;
  38.   }
  39.  
  40.   protected function disconnect( $conn )
  41.   {
  42.     $conn = NULL;
  43.   }
  44. }

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