<?php

$profile = $_GET['profile'];

    $default_redirect_link = "http://instagram.com";

    $ch = curl_init("https://www.instagram.com/".$profile."/");
    curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt ($ch, CURLOPT_TIMEOUT, 10);
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 10);
    curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt ($ch, CURLOPT_HTTPHEADER, array(
        'user-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36',
    ));

    $data = curl_exec($ch);

    curl_close ($ch);

    $data = explode(";</script>", explode("window._sharedData = ", $data)[1])[0];

    if($data[0] == "{"){

        $json_data = json_decode($data);

        $external_url = $json_data->entry_data->ProfilePage[0]->graphql->user->external_url;

        if($external_url != null){
            header("Location: ".$external_url);
        }else{
            header("Location: ".$default_redirect_link);
        }
    }else{
        header("Location: ".$default_redirect_link);
    }

?>