PHP - Store Data Into Php File Without Being Directed To That Page

What is the best way to store this data coming from the api into a csv file to later put into the db. Output: rank, level, xp, rank, level, xp, etc. This api produces about 60 rows of data per name ran and x that by about roughly 300 names that equals a lot of data. Pretty much with my current code I am pretty much creating a endless loop almost that would take a long time to execute so updating said data would be a nightmare i would think. Is there a way to accomplish the same thing without the loop or I am not sure how to go about this. My current code is a mess that much I know I am gonna be told. This code works, just not efficiently. I am thinking there may be a better way to do this.

$query = $conn->prepare("SELECT name FROM users LIMIT 1");
$query->execute();

while($row = $query->fetch(PDO::FETCH_ASSOC)){
  $name = $row['name'];
  $url = 'https://secure.runescape.com/m=hiscore/index_lite.ws?player='. 
  $name . '';//api that the csv data is coming from 
  $highscores = file_get_contents($url);
  $fields = array("Name", "Rank", "Level", "Xp");//this is to add the headers 
 // for the csv files
  $implode1 = implode($fields, ",");//turn into csv format, not sure this is 
  //even needed
  $implode1 .= "\n";/*this is to add a line break so that the explode below 
   will properly put it into its own element*/
   //otherwise data starts joining togather
  $extra_data = array("$name");/*This is to add the name that the data
  pertains too*/
  $implode2 = implode($extra_data, ",");//turn into csv format
  $highscores =  $implode1 . $implode2 . $highscores;//join as one array    
  $highscores = explode("\n", $highscores);//turn each csv into an element of 
  //its own element
  a bunch of unsets to remove unwanted data. Omitted them to condense the code
  $i = 1;
  header('Content-Type: text/csv');
  header('Content-Disposition: attachment; filename="name.csv"');

  $data = $highscores;

  $fp = fopen('highscores/' . $name . '.csv', 'wb');
  foreach ( $data as $line ) {
     $val = explode(",", $line);
     fputcsv($fp, $val);
 }
   fclose($fp); 

The pdo part I was gonna include but the way I have it setup now wouldn't work. I was thinking that I would use mysql's LOAD DATA INFILE to insert the csv data to database. The end goal here is to be able to search for player stats and to use said data to keep track of xp earned during a xp competition. I PRAY that i have included enough info... I would really appreciate any feedback if possible.

<?php
include 'helpfulfunctions.inc';
include 'productsdata.inc';
$user_login_file = 'login.dat';
//var_dump($_POST);
// product data for photo, name, and price.


$alluserinfo = load_users_info($user_login_file);
//validate users info
$errors = array();
if (array_key_exists('register_submit', $_POST)) {

    //check to see if username is taken
    $username_entered = $_POST['username'];
    //check to see if username already exists
    if (array_key_exists($username_entered, $alluserinfo)) {
        $errors['username']['username_exists'] = "Username already exists.";
    }
    //validate username is 4-11 characters long using only a-z A-Z 0-9
    if(preg_match("/^[0-9a-zA-z]{4,11}$/",$_POST['username']) ===0){
        $errors['username']['invalid_username']= "Invalid username. Username must be 4-11 characters long and use only letters and numbers.";
    }
    //validate password "." means any character
    //.* allows numbers 0-9 to be inserted anywhere
    //?= positive lookahead: next text must be like this and follow these rules
    // must be at least 6 characters, contain 0-9, a-z, A-Z
    $pw_entered=$_POST['password'];
    if(preg_match("/^.*(?=.{6,})(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).*$/", $_POST["password"]) === 0){
        $errors['password']['invalid_password']="Password must be at least 6 characters and must contain at least one lower case letter, one upper case letter and one digit.";
    }
    //validate that "confirm password" matches password above
    $pw_repeat=$_POST['confirmpassword'];
    if($pw_repeat != $pw_entered){
        $errors['confirmpassword']['pw_no_match']="Passwords do not match. Try again.";
    }
    //validate email format
    $email_entered=($_POST['email']);
    if(!filter_var($email_entered, FILTER_VALIDATE_EMAIL)){
        $errors['email']['invalid_email']="Not a valid email. Please try again.";
    }
//no validation errors=>print invoice
    if (empty($errors)) {
        include 'invoice.inc';
        exit;
    }
}
//reprint if invalid entry. if no errors print invoice
?>

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
    <h3>Please register to continue.</h3>
    <table>
        <tr>
            <td>
    *Username: 
            </td>
            <td>
    <input type="text" name="username"/>                
    <?php
    if (isset($errors['username'])) {
        print implode('<br>', $errors['username']);
    }
    ?>
            </td>
        </tr>
        <tr>
            <td>
    *Password:
            </td>
            <td>
    <input type="password" name="password"/>
    <?php
    if (isset($errors['password'])) {
        print implode('<br>', $errors['password']);
    }
    ?>
            </td>
        </tr>
        <tr>
            <td>
    *Confirm Password: 
            </td>
            <td>
    <input type="password" name="confirmpassword"/>
    <?php
    if (isset($errors['confirmpassword'])) {
        print implode('<br>', $errors['confirmpassword']);
    }
    ?>
            </td>
        </tr>
        <tr>
            <td>
    *Email: 
            </td>
            <td>
    <input type="text" name="email"/>
    <?php
    if (isset($errors['email'])) {
        print implode('<br>', $errors['email']);
    }
    ?>
            </td>
        </tr>
        <tr>
            <td>
    * required info <br>
    <input type="submit" value="Register" name="register_submit">
    <?php
    //print out hiddens with quantities
    save_hidden_qty($_POST['quantity']);
    ?>   
           
    
</form>
 </td>
        </tr>
</table>

<?php

if (!function_exists('load_users_info')) {

 function load_users_info($users_data_file) {
        $fp = fopen($users_data_file, 'r');
//read all lines of login.dat file and create user info arrays
        while (!feof($fp)) {
            $users_info_line = fgets($fp);
            $user_info_parts = explode(',', $users_info_line);
            $user_info_array = array('username' => $user_info_parts[0], 'password' => $user_info_parts[1], 'email' => $user_info_parts[2]);
            $complete_user_info_array[$user_info_array['username']] = $user_info_array;
        }

        fclose($fp);
        return $complete_user_info_array;
    }

}

// function to display products
if (!function_exists('display_products')) {

    function display_products($products_to_display, $quantities = array()) {
        global $errors;
        ?>
        <table border="1">
            <tbody>
                <tr>
                    <td style="text-align: center;"><b><big>Product</big></b></td>
                    <td style="text-align: center;"><b><big>Brand</big></b></td>
                    <td style="text-align: center;"><b><big>Price(each)</big></b></td>
                    <td style="text-align: center;"><b><big>Quantity Desired</big></b></td>
                </tr>
                <?php

                // quantities are 0 unless already inputted, if quantities previously were inputted, return the values. 
                // input boxes
                for ($i = 0; $i < count($products_to_display); $i++) {
                    if (empty($quantities)) {
                        $qty = isset($_POST['quantity'][$i]) ? $_POST['quantity'][$i] : 0;
                        $qty_str = "<input type=text size=3 maxlength=3 name='quantity[$i]' value='$qty'>";
                        if (isset($errors['quantity'][$i])) {
                            $qty_str .= "<span style='font-style:italic;font-size:8px;color:red;'>{$errors['quantity'][$i]}</span>";
                        }
                    } else {
                        $qty_str = $quantities[$i];
                    }
                    // loop to print out table of photo of board, name of the brand, price, and quantity selected
                    printf('
                <tr>
                    <td><img alt="Small" id="lightboxImage"
                             style="width: 119px; height: 88px; bgcolor="#cccccc;"
                             src="http://imgur.com/%s"
                             height="300" width="300"></td>
                    <td style="text-align: center;">%s</td> 
                    <td style="text-align: center;">$%.2f</td>
                    <td style="text-align: center;">' . $qty_str . '</td>
                </tr>
                        ', $products_to_display[$i]['item'], $products_to_display[$i]['board'], $products_to_display[$i]['price']);
                }
                ?>
                <tr><td colspan="4" style="text-align: right; border: none">
                        <input type="submit" value="Purchase"></td></tr>

            </tbody>
        </table>
    <?php

    }

}

if (!function_exists('save_hidden_qty')) {
    function save_hidden_qty($the_quantities){
        foreach ($the_quantities as $key=>$value){
            print "<input type='hidden' name='quantity[$key]' value='$value'>\n";
        }
    }
}

?>