diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index f52163c..f4597c7 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -125,8 +125,7 @@
 		}
 		else
 		{
-			// Persistent connection support was added in PHP 5.3.0
-			$hostname = ($persistent === TRUE && is_php('5.3'))
+			$hostname = ($persistent === TRUE)
 				? 'p:'.$this->hostname : $this->hostname;
 			$port = empty($this->port) ? NULL : $this->port;
 			$socket = NULL;
@@ -502,8 +501,8 @@
 		if ( ! empty($this->_mysqli->connect_errno))
 		{
 			return array(
-				'code' => $this->_mysqli->connect_errno,
-				'message' => is_php('5.2.9') ? $this->_mysqli->connect_error : mysqli_connect_error()
+				'code'    => $this->_mysqli->connect_errno,
+				'message' => $this->_mysqli->connect_error
 			);
 		}
 
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index df7e084..56fdf32 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -386,7 +386,7 @@
 	 */
 	protected function _trans_begin()
 	{
-		$this->commit_mode = is_php('5.3.2') ? OCI_NO_AUTO_COMMIT : OCI_DEFAULT;
+		$this->commit_mode = OCI_NO_AUTO_COMMIT;
 		return TRUE;
 	}
 
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
index 38a5a8a..3631cdf 100644
--- a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -106,7 +106,7 @@
 			empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
 			empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
 		}
-		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE && is_php('5.3.6'))
+		elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE)
 		{
 			$this->dsn .= ';charset='.$this->char_set;
 		}
@@ -122,17 +122,6 @@
 	 */
 	public function db_connect($persistent = FALSE)
 	{
-		/* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
-		 * on connect - it was ignored. This is a work-around for the issue.
-		 *
-		 * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
-		 */
-		if ( ! is_php('5.3.6') && ! empty($this->char_set))
-		{
-			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
-				.(empty($this->dbcollat) ? '' : ' COLLATE '.$this->dbcollat);
-		}
-
 		if (isset($this->stricton))
 		{
 			if ($this->stricton)
@@ -169,8 +158,7 @@
 			$this->options[PDO::MYSQL_ATTR_COMPRESS] = TRUE;
 		}
 
-		// SSL support was added to PDO_MYSQL in PHP 5.3.7
-		if (is_array($this->encrypt) && is_php('5.3.7'))
+		if (is_array($this->encrypt))
 		{
 			$ssl = array();
 			empty($this->encrypt['ssl_key'])    OR $ssl[PDO::MYSQL_ATTR_SSL_KEY]    = $this->encrypt['ssl_key'];