1 files changed, 41 insertions, 43 deletions

diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index dbba12e15..f38b94c13 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -2,7 +2,7 @@
 /**
  * CodeIgniter
  *
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP 5.2.4 or newer
  *
  * NOTICE OF LICENSE
  *
@@ -144,26 +144,25 @@ class CI_DB_mysqli_driver extends CI_DB {
 	 * Set client character set
 	 *
 	 * @param	string
-	 * @param	string
 	 * @return	bool
 	 */
-	protected function _db_set_charset($charset, $collation)
+	protected function _db_set_charset($charset)
 	{
-		return function_exists('mysqli_set_charset')
-			? @mysqli_set_charset($this->conn_id, $charset)
-			: @mysqli_query($this->conn_id, "SET NAMES '".$this->escape_str($charset)."' COLLATE '".$this->escape_str($collation)."'");
+		return @mysqli_set_charset($this->conn_id, $charset);
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Version number query string
+	 * Database version number
 	 *
 	 * @return	string
 	 */
-	protected function _version()
+	public function version()
 	{
-		return @mysqli_get_server_info($this->conn_id);
+		return isset($this->data_cache['version'])
+			? $this->data_cache['version']
+			: $this->data_cache['version'] = @mysqli_get_server_info($this->conn_id);
 	}
 
 	// --------------------------------------------------------------------
@@ -287,18 +286,7 @@ class CI_DB_mysqli_driver extends CI_DB {
 			return $str;
 		}
 
-		if (function_exists('mysqli_real_escape_string') && is_object($this->conn_id))
-		{
-			$str = mysqli_real_escape_string($this->conn_id, $str);
-		}
-		elseif (function_exists('mysql_escape_string'))
-		{
-			$str = mysql_escape_string($str);
-		}
-		else
-		{
-			$str = addslashes($str);
-		}
+		$str = is_object($this->conn_id) ? mysqli_real_escape_string($this->conn_id, $str) : addslashes($str);
 
 		// escape LIKE condition wildcards
 		if ($like === TRUE)
@@ -351,7 +339,7 @@ class CI_DB_mysqli_driver extends CI_DB {
 			return 0;
 		}
 
-		$query = $this->query($this->_count_string.$this->_protect_identifiers('numrows').' FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE));
+		$query = $this->query($this->_count_string.$this->protect_identifiers('numrows').' FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
 		if ($query->num_rows() == 0)
 		{
 			return 0;
@@ -397,46 +385,56 @@ class CI_DB_mysqli_driver extends CI_DB {
 	 */
 	protected function _list_columns($table = '')
 	{
-		return 'SHOW COLUMNS FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE);
+		return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * Field data query
-	 *
-	 * Generates a platform-specific query so that the column data can be retrieved
+	 * Returns an object with field data
 	 *
 	 * @param	string	the table name
-	 * @return	string
+	 * @return	object
 	 */
-	protected function _field_data($table)
+	public function field_data($table = '')
 	{
-		return 'DESCRIBE '.$table;
-	}
+		if ($table == '')
+		{
+			return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
+		}
 
-	// --------------------------------------------------------------------
+		$query = $this->query('DESCRIBE '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
+		$query = $query->result_object();
 
-	/**
-	 * The error message string
-	 *
-	 * @return	string
-	 */
-	protected function _error_message()
-	{
-		return mysqli_error($this->conn_id);
+		$retval = array();
+		for ($i = 0, $c = count($query); $i < $c; $i++)
+		{
+			preg_match('/([a-z]+)(\(\d+\))?/', $query[$i]->Type, $matches);
+
+			$retval[$i]			= new stdClass();
+			$retval[$i]->name		= $query[$i]->Field;
+			$retval[$i]->type		= empty($matches[1]) ? NULL : $matches[1];
+			$retval[$i]->default		= $query[$i]->Default;
+			$retval[$i]->max_length		= empty($matches[2]) ? NULL : preg_replace('/[^\d]/', '', $matches[2]);
+			$retval[$i]->primary_key	= (int) ($query[$i]->Key === 'PRI');
+		}
+
+		return $retval;
 	}
 
 	// --------------------------------------------------------------------
 
 	/**
-	 * The error message number
+	 * Error
 	 *
-	 * @return	int
+	 * Returns an array containing code and message of the last
+	 * database error that has occured.
+	 *
+	 * @return	array
 	 */
-	protected function _error_number()
+	public function error()
 	{
-		return mysqli_errno($this->conn_id);
+		return array('code' => mysqli_errno($this->conn_id), 'message' => mysqli_error($this->conn_id));
 	}
 
 	// --------------------------------------------------------------------