Connessione a MySQL tramite classe

[jr1980]

Buon giorno,

proprio quà in HTML.IT ho trovato nelle raccolte di script scaricabili questa classe che gestisce la connessione e relativa query a MySQL ...

Unico problema ... non riesco a farla funzionare ... Credo sia una cosa banale ma non trovo proprio soluzione ... ad esempio se volessi stampare il contenuto di una tabella del mio db ... che codice devo scrivere???

ini_set('error_reporting', E_ALL);
ini_set("display_errors", 1);

$My_db=new base_mysql("localhost", "root", "root", "miodatabase");
        $My_db->base_Open();
        $My_db->base_Query("SELECT * FROM url");
        
          

        $My_db->base_Close();
        
           /*or
       $My_db=new base_mysql($DB_HostName, $DB_user, $DB_Password, "");
       $My_db->base_Open();
       $My_db->base_Select_DB($DB_Name);
       $My_db->base_Query($my_query);
        ... your code ...
       $My_db->base_Select_DB($OtherDB_Name);
       etc.*/

class base_mysql {
  /* public variables*/


  /* private variables */
  var $_DB_Name;
  var $_DB_User;
  var $_DB_Pass;
  var $_DB_Host;
  var $_DB_Link;
  var $_query_ID;
  var $_row;
  var $_debug;
  var $_error_handling;
  var $_stop_on_error;
    
  /* private constants*/
  var $_terminated;

/********* CLASS CONSTRUCTOR *********/
  function base_mysql ($Host_DB="localhost", $User_DB="root", $Pass_DB="",$Name_DB="")
  {
    $this->base_Continue();
    $this->base_errors();
    $this->base_Debug();
    $this->_DB_Name = $Name_DB;
    $this->_DB_User = $User_DB;
    $this->_DB_Pass = $Pass_DB;
    $this->_DB_Host = $Host_DB;
    $this->_DB_link = 0;
    $this->_query_ID = 0;
    $this->_terminated = "
[b]!!!SCRIPT TERMINATED CAUSE ERROR!!![/b]";

  }



/*********  SETTINGS  *********/

  function base_Debug($ON_OFF = False)
  /* 
     ON_OFF = False - deactivate debug messages.
     ON_OFF = True - activate debug messages.
  */
  {
   $this->_debug=$ON_OFF;
  }
  
    function base_errors($ON_OFF = True)
  /* 
     ON_OFF = False - deactivate error handling.
     ON_OFF = True - activate error handling.
  */
  {
   $this->_error_handling=$ON_OFF;
  }
  
  function base_Continue($ON_OFF = True)
  /* 
     ON_OFF = False - stop script after an error.
     ON_OFF = True - don't stop script after an error.
  */
  {
   $this->_stop_on_error = $ON_OFF;
  }
  

/********* CLASS METHODS *********/  
  function base_Open()
  { 
    if ($this->_debug)
    { echo "
[i]Hostname: [b]$this->_DB_Host[/b]
";
      echo "User: [b]$this->_DB_User[/b][/i]
";
    }
    if (($this->_DB_User=="") || ($this->_DB_Host=="")) {$this->_errors(1);}
    else
    {
     $this->_DB_Link = mysql_connect ($this->_DB_Host, $this->_DB_User, $this->_DB_Pass);
     if (!$this->_DB_Link)
      {$this->_errors();}
     else
      { if ($this->_debug==True) {echo "
[i]Connection to DB server [b]$this->_DB_Host[/b] active.[/i]
";}
        if ($this->_DB_Name!="") {$this->base_Select_DB($this->_DB_Name);}
      }
    } 
  }

  
  function base_Close()
  {
    if ($this->_DB_Link)
    {
     if ($this->_debug==True) {echo "
[i]Closing connection to DB server [b]$this->_DB_Host[/b].[/i]
";}
     if (!mysql_close($this->_DB_Link)) $this->_errors();
    }
  }

 
  function base_Select_DB ($other_DB_Name="")
  {
   if ($other_DB_Name=="") {$this->_errors(2);}
   else
   {
    if ($this->_DB_Link==0) {$this->_errors(4);}
    else
    {
     if (mysql_select_db($other_DB_Name, $this->_DB_Link))
      {$this->_DB_Name = $other_DB_Name;
       if ($this->_debug==True) {echo "
[i]Database [b]$this->_DB_Name[/b] selected.[/i]
";}
      }
     else {$this->_errors();}
    }
   }    
  }
  

  function base_Get_DB()
  { /* returns the current selected DB or empty if none */
   return $this->_DB_Name; 
  } 


  function base_Query($_sql)
  { /* execute a query */
   if (!$this->_DB_Link) {$this->_errors(4);}
   else
   {
    if ($this->_debug==True) {echo"
[i]Executing query[/i]: [b]$_sql[b].
";}
    $this->_query_ID = mysql_query ($_sql, $this->_DB_Link);
    if (!$this->_query_ID)
     {$this->_errors();
      unset ($_sql);
      return False;}
    else
    {unset ($_sql);
     return True;}
   }
  }
 
  
  function base_Num_Rows()
  {
   if ($this->_query_ID!=0)
    { 
     $Number = mysql_num_rows($this->_query_ID);
     if (is_null($Number)){return "NULL";}
     else {return $Number;}
    }
   else 
    {
     $this->_errors(3);
     return False;
    }
  }
 
  function base_Affected_Rows()
  {
   if ($this->_DB_Link!=0)
    {
     $Number = mysql_affected_rows($this->_DB_Link);
     if (is_null($Number)){return "NULL";}
     else {return $Number;}
    }
   else 
    {
     $this->_errors(4);
     return False;
    }
  } 
  
  function base_Data_Seek($row_number=0)
  {
   if ($this->_query_ID!=0)
    { mysql_data_seek($this->_query_ID,$row_number);}
   else 
    {
     $this->_errors(3);
     return False;
    } 
  }
  
  
  function base_Fetch_Row()
  {
   if ($this->_query_ID!=0)
    { return mysql_fetch_row($this->_query_ID);}
   else 
    {
     $this->_errors(3);
     return False;
    }    
  }
  
  

 
 /********* ERROR HANDLING FUNCTION *********/ 
  function _errors ($int_err=0)
  {if (!$this->_error_handling) {return False;}
   else
   {
    switch ($int_err)
    {
    case 0: /* for My_SQL errors handling */
      echo "
[b]Error number:[/b] $mysql_errno()
";
      echo "[b]Error Text:[/b] $mysql_error()
";
      break;
      
    case 1:
      echo "
[b]Please specify User/Host![/b]
";
      break;
    
    case 2:
      echo "
[b]Database name not set.[/b]
";
      break; 
      
    case 3:
      echo "
[b]No valid query have been executed.[/b]
";
      break;
    
    case 4:
      echo "
[b]No DB connection available.[/b]
";
      break;

    default:
      break;
    } 
    if (!$this->_stop_on_error) die($this->_terminated);
   }
  }
  
 /********* OTHER FUNCTIONS *********/
 function _is_boolean($_to_check)
 {/* for future use */
  if (is_bool($_to_check))
   {return True;}
  else
   {$this->_errors(4);
    return False;}
 }
  
}