My PHP code cannot access MySQL database

When I try to connect I get this error:

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /storage/h10/802/1164802/public_html/login.php:14 Stack trace: #0 /storage/h10/802/1164802/public_html/mainlogin.php(2): include() #1 {main} thrown in /storage/h10/802/1164802/public_html/login.php on line 14

Here is the code I have on line 14:
$connection = mysql_connect(“localhost”, “id1164802_testuser”, “testpass”);

Hello Good day i also have the same proble i cant connect i change my php version to the lowest which is 5.2 (ayaw parin tagalog language)

ProxySQL Error: Access denied for user ‘id157972_root’@‘2a02:4780:bad:f00d::7’ (using password: YES)

here is my full code:

<?php //Start session session_start(); //Array to store validation errors $errmsg_arr = array(); //Validation error flag $errflag = false; //Connect to mysql server $conn = mysql_connect("localhost", "id157972_root","id157972_sales","pass123") or die(mysql_error()); mysql_select_db("id157972_sales", $conn); if(!$conn) { die('Failed to connect to server: ' . mysql_error()); } //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 mysql_real_escape_string($str); } //Sanitize the POST values $login = clean($_POST['username']); $password = clean($_POST['password']); //Input Validations if($login == '') { $errmsg_arr[] = 'Username missing'; $errflag = true; } if($password == '') { $errmsg_arr[] = 'Password missing'; $errflag = true; } //If there are input validations, redirect back to the login form if($errflag) { $_SESSION['ERRMSG_ARR'] = $errmsg_arr; session_write_close(); header("location: index.php"); exit(); } //Create query $qry="SELECT * FROM user WHERE username='$login' AND password='$password'"; $result=mysql_query($qry); //Check whether the query was successful or not if($result) { if(mysql_num_rows($result) > 0) { //Login Successful session_regenerate_id(); $member = mysql_fetch_assoc($result); $_SESSION['SESS_MEMBER_ID'] = $member['id']; $_SESSION['SESS_FIRST_NAME'] = $member['name']; $_SESSION['SESS_LAST_NAME'] = $member['position']; //$_SESSION['SESS_PRO_PIC'] = $member['profImage']; session_write_close(); header("location: main/index.php"); exit(); }else { //Login failed header("location: index.php"); exit(); } }else { die("Query failed"); } ?>

@Levis Is your issue solved??

@malunaoreymart Is your solved??