Escape function and Bindings are safe now?

[eluser]gurthgor[/eluser]
I readed some old posts about the escape function and i am not sure if it uses addslashes or mysqli_real_escape_string.

Also wanted to know if Escape Bindings work with mysqli_real_escape_string too.

I found this in mysql_driver, not sure if escape uses this function

function escape_str($str)
{
if (function_exists('mysqli_real_escape_string') AND is_object($this->conn_id))
{
return mysqli_real_escape_string($this->conn_id, $str);
}
elseif (function_exists('mysql_escape_string'))
{
return mysql_escape_string($str);
}
else
{
return addslashes($str);
}
}