PHP - Moved: About Large Scale Webserver Applications

<?php

/*
 * Development API Key
 * @since 1.0
 *
 * Rate Limit(s):
 * 10 request(s) every 10 second(s)
 * 500 request(s) every 10 minute(s)
 */
define( "__API_KEY__" , "---------------------------------" );

require_once dirname( dirname(__FILE__) ) . "\\settings.php";

class API
{

    // If successfull it returns an object from the url that's passed to this function.	
    private function api_call($url)
    {
	$result = null; // end result

        // Create a new curl handle.
        $ch = curl_init();

        curl_setopt($ch , CURLOPT_URL, "https://" . $url . "?api_key=" . __RIOT_API_KEY__); // set the URL
        curl_setopt($ch , CURLOPT_RETURNTRANSFER , true  ); // return the transfer as a string of the return value
        curl_setopt($ch , CURLOPT_SSL_VERIFYPEER , false ); // turn off ssl certificate verification

        // Execute the api call
        $response = curl_exec($ch);
        // Get info to analyze the result
        $ci = curl_getinfo($ch);

        $httpcode = $ci["http_code"];

        // If a curl error occured
        if(curl_errno($ch) || ($httpcode != "200"))
        {
            $die  = "Curl Error Code: "    . $httpcode       . "<br/>";
            $die .= "Curl Error Message: " . curl_errno($ch) . "<br/>";
            $die .= "Curl URL: "           . $ci["url"]      . "<br/>";
            die($die);
        } else {

            // Check if the api call we made was valid

            $response = json_decode($response, true);

            // If our response is an array check if it's an error response
            if(is_array($response))
            {
                $error_key = "status";
                if(array_key_exists($error_key, $response))
                {
                    $er = $response[$error_key];
                    $die  = "API Error Message: " . $er["message"]     . "<br/>";
                    $die .= "API Error Code: "    . $er["status_code"] . "<br/>";
                    die($die);
                }
            }

            // Our response is a valid object
            $result = $response;
    }

    private function sanitize_url($url)
    {
        // removes all whitespaces
        return trim(preg_replace( '/\s+/','',$url));
    }

    private function regional_endpoints()
    {
        static $regionini;

        if(is_null($regionini))
            $regionini = parse_ini_file(INI_REGIONAL_ENDPOINTS, true);

        return $regionini;
    }

    private function region_host($shortcode)
    {
        /*
         * regionalendpoints.ini
         * @since 1.0
         *
         * [SHORTCODE]
         * Description=<region_description>
         * Host=<host_url>
         */
        return $this->regional_endpoints()[strtoupper($shortcode)]["Host"];
    }

    public  function region_description($shortcode)
    {
        /*
        * regionalendpoints.ini
        * @since 1.0
        *
        * [SHORTCODE]
        * Description=<region_description>
        * Host=<host_url>
        */
        return $this->regional_endpoints()[strtoupper($shortcode)]["Description"];
    }

    public function api_object_by_name($name, $region)
    {
        /*
         * @Description: Get summoner objects mapped by standardized summoner name for a given list of summoner names.
         *
         *
         * @Returns: Map[string, SummonerDto]
         *
         * Object
         * ------------------------------------------------------------------------------------------------------
         * Name             Data Type          Description
         * ------------------------------------------------------------------------------------------------------
         * id	            long	           ID.
         * name	            string	           Name.
         * profileIconId    int                    ID of the summoner icon associated with the summoner.
         * revisionDate	    long	           Date summoner was last modified specified as epoch milliseconds.
         * Level            long	           Level associated with the summoner.
         */

         $api_url = "%s/api/col/%s/v1.4/obj/by-name/%s";

        return $this->api_call(sprintf($api_url,
            $this->region_host($region),
            strtolower($region),
            $this->sanitize_url($name)));
    }

}

<?php

include dirname(__FILE__) . "\\class-riotapi.php";

define( "SUMMONER_NAME" , 0 );
define( "SUMMONER_ID"   , 1 );

class Summoner
{

    private $riotapi        = null;

    private $summoner       = null;
    private $arr_summoners  = null;
    private $region         = null;


    public function __construct()
    {
        // Create our riot api object
        $this->riotapi = new RiotAPI();
    }


    public function summoner_exists($summoners, $region, $type = SUMMONER_NAME)
    {
        static $eoa; // end of array

        // If our array of summoners is empty or we have reached the end of the array.
        if( empty($this->arr_summoners) || $eoa )
        {
            // Get an array of summoner information from the riot api based on the type of information
            // supplied.
            switch($type)
            {
                case SUMMONER_NAME :
                    $this->arr_summoners = $this->riotapi->api_summoner_by_name($summoners, $this->region = $region);
                    break;

                case SUMMONER_ID :
                    $this->arr_summoners = $this->riotapi->api_summoner_by_id($summoners, $this->region = $region);
                    break;
            }

            // If our array of summoners isn't empty.
            if( !empty($this->arr_summoners) )
            {
                // Set our current summoner the first element in the array.
                $this->summoner = reset($this->arr_summoners);
            } else {
                // We failed to acquire any summoner information so return false.
                return false;
            }

            $eoa = false;

        } else {

            // If we have not reached the end of the summoners array set our current
            // summoner to the next element.
            $next = next($this->arr_summoners);

            // Have we reached the end of the array?
            if( $next ) {
                // No. Set our current summoner to the next element.
                $this->summoner = $next;
            } else {
                // Yes. Set our end of array variable to true.
                $eoa = true;
                // End the loop
                return false;
            }

        }

        return true;
    }


    public function summoner_id()
    {
        return $this->summoner["id"];
    }


    public function summoner_name()
    {
        return $this->summoner["name"];
    }


    public function summoner_profile_icon_id()
    {
        return $this->summoner["profileIconId"];
    }


    public function summoner_last_updated()
    {
        return $this->summoner["revisionDate"];
    }


    public function summoner_level()
    {
        return $this->summoner["summonerLevel"];
    }


    public function summoner_mastery_pages()
    {
        return $this->riotapi->api_summoner_masteries($this->summoner_id(),
            $this->region)[$this->summoner_id()]["pages"];
    }

}

<?php

require_once "settings.php";
include DIR_INCLUDE . "class-summoner.php";

function summoner_exists($summoners, $region = "NA", $type = SUMMONER_NAME)
{
    global $cs;
    if(!isset($cs)){
        $cs = new Summoner();
    }
    return $cs->summoner_exists($summoners, $region, $type);
}

function summoner_name()
{
    global $cs;
    if(isset($cs)){
        echo $cs->summoner_name();
    }
}

?>

<?php include "functions.php"; ?>
<html xmlns="http://www.w3.org/1999/xhtml">
<body>

<?php while(summoner_exists("cyllo")) : ?>

    <div>Summoner Name: <?php summoner_name(); ?></div>
    <div>Summoner ID: <?php summoner_id(); ?></div>
    <div>Summoner Profile icon ID: <?php summoner_profile_icon_id(); ?></div>
    <div>Last Updated: <?php summoner_last_updated(); ?></div>
    <div>Summoner Level: <?php summoner_level(); ?></div>

    <div>
        <?php mastery_pages(); ?>
    </div>

<?php endwhile; ?>
</body>
</html>

I have two related websites which utilize the same database:

Currently, I have both located in /var/www/combined-app which is a single git repository and contains the following:

/var/www/combined-app/
    public/
    public-admin/
    src/
        main/
        admin/
    vendor/
    composer.json
    bootstrap.php

Alternatively, I could have done the following:

/var/www/combined-app/
    main/
        public/
        src/
        vendor/
        composer.json
        bootstrap.php
    admin/
        public/
        src/
        vendor/
        composer.json
        bootstrap.php

Or maybe something else all together?

Is one approach typically better than the other?   If so, please provide reasons why.  If my second example, would you recommend separate git repositories for main and admin?

Thanks