How do I fix this highscore php script?

Fatal error: Uncaught Error: Call to undefined function mysql_connect() [/code:91zd5q7n]

and

[code:91zd5q7n] Stack trace: #0 {main} thrown in[/code:91zd5q7n]

Im guessing mysql_connect() does not work anymore? i think i might be on php7

Is there anyone here who can help me you?

Here is the scripts:
getscores.php

[code:91zd5q7n]<?php
 // Date in the past
 header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
 // always modified
 header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 // HTTP/1.1
 header("Cache-Control: no-store, no-cache, must-revalidate"); 
 header("Cache-Control: post-check=0, pre-check=0", false);
 // HTTP/1.0
header("Pragma: no-cache");
header('Access-Control-Allow-Origin: *');
$host="HOTNAME"; // Host name 
$username="USERNAME"; // Mysql username 
$password="PASSWORD"; // Mysql password 
$db_name="MYDB"; // Database name 
$tbl_name="scores"; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// Retrieve data from database 
$sql="SELECT * FROM scores ORDER BY score DESC LIMIT 30";
$result=mysql_query($sql);

// Start looping rows in mysql database.
while($rows=mysql_fetch_array($result)){
echo $rows['name'] . "|" . $rows['score'] . "|";

// close while loop 
}
// close MySQL connection 
mysql_close();
?>[/code:91zd5q7n]

And here is savescores.php

[code:91zd5q7n]<?php
$db = "DBNAME";//Your database name
$dbu = "DBUSERt";//Your database username
$dbp = "PASS";//Your database users' password
$host = "HOSTNAME";//MySQL server - usually localhost
$dblink = mysql_connect($host,$dbu,$dbp);
$seldb = mysql_select_db($db);

if(isset($_GET['name']) && isset($_GET['score'])){

     //Lightly sanitize the GET's to prevent SQL injections and possible XSS attacks
     $name = strip_tags(mysql_real_escape_string($_GET['name']));
     $score = strip_tags(mysql_real_escape_string($_GET['score']));

     //Tjek om brugeren findes
     $sql = mysql_query("SELECT * FROM scores WHERE name = '".$name."' ");

     //Findes brugeren (tjekker om SQL er ok, og om der mere end 0 rækker retur)
     if($sql && mysql_num_rows($sql)>0)
     {
          //DEr findes allerede en med dette navn, shit!
          //Vi finder lige højeste score lidt kluntet.
          $highest = 0;
          while($r = mysql_fetch_array($sql))
          {
               if($r['score']>$highest)
               {
                    $highest = $r['score'];
               }
          }
          //Hvis den nye score er højere end den højeste!
          if($score>$highest)
          {
               //Ny highscore!
               mysql_query("DELETE FROM scores WHERE name = '".$name."'");
          }
     }
     //Indsæt ny highscore!
     $sql = mysql_query("INSERT INTO `$db`.`scores` (`id`,`name`,`score`) VALUES ('','$name','$score');");
     
     if($sql){
     
          //The query returned true - now do whatever you like here.
          echo 'Your score was saved. Congrats!';
          
     }else{
     
          //The query returned false - you might want to put some sort of error reporting here. Even logging the error to a text file is fine.
          echo 'There was a problem saving your score. Please try again later.';
          
     }    
}else{
     echo 'Your name or score wasnt passed in the request. Make sure you add ?name=NAME_HERE&score=1337 to the tags.';
}
mysql_close($dblink);//Close off the MySQL connection to save resources.
?>[/code:91zd5q7n]