I don't know the problem with log in file

Question

In the browser it out puts the following:

Connected successfully
Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given in C:\xampp\htdocs\social\login.php on line 14

Fatal error: Uncaught Error: Call to undefined function mysql_query() in C:\xampp\htdocs\social\login.php:27 Stack trace: #0 {main} thrown in C:\xampp\htdocs\social\login.php on line 27

The source

//Function to sanitize values received from the form. Prevents SQL injection
function clean($str) {
$str = @trim($str);
if(get_magic_quotes_gpc()) {
$str = stripslashes($str);
}
return mysqli_real_escape_string($str); //line 14
}

//Sanitize the POST values
$UserName = clean($_POST['UserName']);
$Password =(md5($_POST['Password']));

//Create query
$qry="SELECT * FROM members WHERE UserName='$UserName' AND Password='$Password'";
$result=mysql_query($qry); //line 27

Where is the problem guys

Answer 1

for line 14 check here: https://www.w3resource.com/php/function-reference/mysqli_real_escape_string.php for line 27 you seem to be mixing mysql and mysqli - see here: https://stackoverflow.com/questions/39493105/call-to-undefined-function-mysql-query-with-login