Take for example this
以这个为例
$username = mysql_real_escape_string($_GET['username']);
$password = mysql_real_escape_string($_GET['password']);
$sql = "SELECT * FROM users WHERE username = $username AND password = $password";
$username = mysTake for example this
以这个为例
$username = mysql_real_escape_string($_GET['username']);
$password = mysql_real_escape_string($_GET['password']);
$sql = "SELECT * FROM users WHERE username = $username AND password = $password";
$username = mys