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<?php
/**
* PDOSingleton class
* @author Beno!t POLASZEK - 2013
*/
class PDOSingleton {
/**
* Current Instance
*/
private static $instance;
/**
* PDO object Instance
*/
private $PDOInstance = null;
/**
* Constructor
*
* @param string $dsn : Data source name
* @param string $username : User Name
* @param string $password : User Password
* @param string $driver_options : PDO Specific options
* @return PDO PDOInstance
*/
private function __construct($dsn, $username = null, $password = null, $driver_options = null) {
$this->PDOInstance = new PDO($dsn, $username, $password, $driver_options);
}
/**
* Singleton call
*
* @param string $dsn : Data source name
* @param string $username : User Name
* @param string $password : User Password
* @param string $driver_options : PDO Specific options
* @return PDO PDOInstance
*/
public static function Cnx($dsn = null, $username = null, $password = null, $driver_options = null) {
if (is_null(self::$instance))
self::$instance = new self($dsn, $username, $password, $driver_options);
return self::$instance;
}
/**
* Prepares a SQL Query and executes it
*
* @param string $SqlString : SQL Query
* @param array $SqlParams : PDO Params to bind
* @return PDOStatement Stmt
*/
public function Sql($SqlString, array $SqlParams = array()) {
$Stmt = self::Cnx()->Prepare($SqlString);
foreach ($SqlParams AS $Key => $Value)
$Stmt -> BindValue(':' . $Key, $Value, self::PDOType($Value));
$Stmt->Execute();
return $Stmt;
}
/**
* SqlArray executes Query : returns the whole result set
*
* @param string $SqlString : SQL Query
* @param array $SqlParams : PDO Params to bind
* @return Array
*/
public function SqlArray($SqlString, array $SqlParams = array()) {
return $this->Sql($SqlString, $SqlParams)->FetchAll(PDO::FETCH_ASSOC);
}
/**
* SqlLine executes Query : returns the 1st row of your result set
*
* @param string $SqlString : SQL Query
* @param array $SqlParams : PDO Params to bind
* @return Array
*/
public function SqlLine($SqlString, array $SqlParams = array()) {
return $this->Sql($SqlString, $SqlParams)->Fetch(PDO::FETCH_ASSOC);
}
/**
* SqlValues executes Query : returns the 1st column of your result set
*
* @param string $SqlString : SQL Query
* @param array $SqlParams : PDO Params to bind
* @return Array
*/
public function SqlValues($SqlString, array $SqlParams = array()) {
return $this->Sql($SqlString, $SqlParams)->FetchAll(PDO::FETCH_COLUMN);
}
/**
* SqlValue executes Query : returns the 1st cell of your result set
*
* @param string $SqlString : SQL Query
* @param array $SqlParams : PDO Params to bind
* @return String
*/
public function SqlValue($SqlString, array $SqlParams = array()) {
return $this->Sql($SqlString, $SqlParams)->Fetch(PDO::FETCH_COLUMN);
}
/**
* Magic call - PDO methods
*/
public function __call($Method, $Args) {
$Args = implode(', ', $Args);
if ($Args)
return $this->PDOInstance->$Method($Args);
else
return $this->PDOInstance->$Method();
}
/**
* PDO Automatic type binding
*
* @param mixed var
* @return PDO const
*/
private static function PDOType($Var) {
switch (gettype($Var)) :
case 'int' :
case 'integer' :
return PDO::PARAM_INT;
case 'double' :
case 'float' :
return PDO::PARAM_STR;
case 'bool' :
case 'boolean' :
return PDO::PARAM_BOOL;
case 'null' :
return PDO::PARAM_NULL;
default :
return PDO::PARAM_STR;
endswitch;
}
} |
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