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-rw-r--r--system/database/DB_driver.php23
1 files changed, 13 insertions, 10 deletions
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index de599a675..1dc23d72e 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -1320,10 +1320,11 @@ abstract class CI_DB_driver {
*
* This function escapes column and table names
*
- * @param mixed
+ * @param mixed $item Identifier to escape
+ * @param bool $split Whether to split identifiers when a dot is encountered
* @return mixed
*/
- public function escape_identifiers($item)
+ public function escape_identifiers($item, $split = TRUE)
{
if ($this->_escape_char === '' OR empty($item) OR in_array($item, $this->_reserved_identifiers))
{
@@ -1344,22 +1345,22 @@ abstract class CI_DB_driver {
return $item;
}
- static $preg_ec = array();
+ static $preg_ec;
if (empty($preg_ec))
{
if (is_array($this->_escape_char))
{
$preg_ec = array(
- preg_quote($this->_escape_char[0], '/'),
- preg_quote($this->_escape_char[1], '/'),
+ preg_quote($this->_escape_char[0]),
+ preg_quote($this->_escape_char[1]),
$this->_escape_char[0],
$this->_escape_char[1]
);
}
else
{
- $preg_ec[0] = $preg_ec[1] = preg_quote($this->_escape_char, '/');
+ $preg_ec[0] = $preg_ec[1] = preg_quote($this->_escape_char);
$preg_ec[2] = $preg_ec[3] = $this->_escape_char;
}
}
@@ -1368,11 +1369,13 @@ abstract class CI_DB_driver {
{
if (strpos($item, '.'.$id) !== FALSE)
{
- return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?\./i', $preg_ec[2].'$1'.$preg_ec[3].'.', $item);
+ return preg_replace('#'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?\.#i', $preg_ec[2].'$1'.$preg_ec[3].'.', $item);
}
}
- return preg_replace('/'.$preg_ec[0].'?([^'.$preg_ec[1].'\.]+)'.$preg_ec[1].'?(\.)?/i', $preg_ec[2].'$1'.$preg_ec[3].'$2', $item);
+ $dot = ($split !== FALSE) ? '\.' : '';
+
+ return preg_replace('#'.$preg_ec[0].'?([^'.$preg_ec[1].$dot.']+)'.$preg_ec[1].'?(\.)?#i', $preg_ec[2].'$1'.$preg_ec[3].'$2', $item);
}
// --------------------------------------------------------------------
@@ -1786,14 +1789,14 @@ abstract class CI_DB_driver {
if ($offset = strripos($item, ' AS '))
{
$alias = ($protect_identifiers)
- ? substr($item, $offset, 4).$this->escape_identifiers(substr($item, $offset + 4))
+ ? substr($item, $offset, 4).$this->escape_identifiers(substr($item, $offset + 4), FALSE)
: substr($item, $offset);
$item = substr($item, 0, $offset);
}
elseif ($offset = strrpos($item, ' '))
{
$alias = ($protect_identifiers)
- ? ' '.$this->escape_identifiers(substr($item, $offset + 1))
+ ? ' '.$this->escape_identifiers(substr($item, $offset + 1), FALSE)
: substr($item, $offset);
$item = substr($item, 0, $offset);
}