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<?php
/**
* @package SPLIB
* @version $Id: MySQL.php,v 1.1 2003/12/12 08:06:07 kevin Exp $
*/
/**
* MySQL Database Connection Class
* @access public
* @package SPLIB
*/
class MySQL {
/**
* MySQL server hostname
* @access private
* @var string
*/
var $host;
/**
* MySQL username
* @access private
* @var string
*/
var $dbUser;
/**
* MySQL user's password
* @access private
* @var string
*/
var $dbPass;
/**
* Name of database to use
* @access private
* @var string
*/
var $dbName;
/**
* MySQL Resource link identifier stored here
* @access private
* @var string
*/
var $dbConn;
/**
* Stores error messages for connection errors
* @access private
* @var string
*/
var $connectError;
/**
* MySQL constructor
* @param string host (MySQL server hostname)
* @param string dbUser (MySQL User Name)
* @param string dbPass (MySQL User Password)
* @param string dbName (Database to select)
* @access public
*/
function MySQL ($host,$dbUser,$dbPass,$dbName) {
$this->host=$host;
$this->dbUser=$dbUser;
$this->dbPass=$dbPass;
$this->dbName=$dbName;
$this->connectToDb();
}
/**
* Establishes connection to MySQL and selects a database
* @return void
* @access private
*/
function connectToDb () {
// Make connection to MySQL server
if (!$this->dbConn = @mysql_connect($this->host,
$this->dbUser,
$this->dbPass)) {
trigger_error('Could not connect to server');
$this->connectError=true;
// Select database
} else if ( !@mysql_select_db($this->dbName,$this->dbConn) ) {
trigger_error('Could not select database');
$this->connectError=true;
}
}
/**
* Checks for MySQL errors
* @return boolean
* @access public
*/
function isError () {
if ( $this->connectError )
return true;
$error=mysql_error ($this->dbConn);
if ( empty ($error) )
return false;
else
return true;
}
/**
* Returns an instance of MySQLResult to fetch rows with
* @param $sql string the database query to run
* @return MySQLResult
* @access public
*/
function & query($sql) {
if (!$queryResource=mysql_query($sql,$this->dbConn))
trigger_error ('Query failed: '.mysql_error($this->dbConn).
' SQL: '.$sql);
return new MySQLResult($this,$queryResource);
}
}
/**
* MySQLResult Data Fetching Class
* @access public
* @package SPLIB
*/
class MySQLResult {
/**
* Instance of MySQL providing database connection
* @access private
* @var MySQL
*/
var $mysql;
/**
* Query resource
* @access private
* @var resource
*/
var $query;
/**
* MySQLResult constructor
* @param object mysql (instance of MySQL class)
* @param resource query (MySQL query resource)
* @access public
*/
function MySQLResult(& $mysql,$query) {
$this->mysql=& $mysql;
$this->query=$query;
}
/**
* Fetches a row from the result
* @return array
* @access public
*/
function fetch () {
if ( $row=mysql_fetch_array($this->query,MYSQL_ASSOC) ) {
return $row;
} else if ( $this->size() > 0 ) {
mysql_data_seek($this->query,0);
return false;
} else {
return false;
}
}
/**
* Returns the number of rows selected
* @return int
* @access public
*/
function size () {
return mysql_num_rows($this->query);
}
/**
* Returns the ID of the last row inserted
* @return int
* @access public
*/
function insertID () {
return mysql_insert_id($this->mysql->dbConn);
}
/**
* Checks for MySQL errors
* @return boolean
* @access public
*/
function isError () {
return $this->mysql->isError();
}
}
?>
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