<?php

$content = file_get_contents(__DIR__.'/accounts');
$accounts = explode("\n", $content);
$accounts = array_filter(array_unique($accounts));
if(empty($accounts)){
    echo("Add accounts to file  'accounts', each in a new line.\n");
}


foreach($accounts as $account){
        echo "$account - ".er($account)."\n";
    sleep(1); // in seconds
}

function er($username){
    $url = "https://www.instagram.com/{$username}/";
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    //curl_setopt($ch, CURLOPT_HEADER, true);
    //curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.119 Safari/537.36');
    $content = curl_exec($ch);
    //print_r(curl_getinfo($ch));
    //print_r($c);
    if(curl_getinfo($ch, CURLINFO_HTTP_CODE) === 404){
        return 'ERR!';
    }

    preg_match('/\_sharedData \= (.*?)\;\<\/script\>/s', $content, $matches);
    $res = json_decode($matches['1'], true);

    $followedBy = $res['entry_data']['ProfilePage']['0']['graphql']['user']['edge_followed_by']['count'];

    $posts = $res['entry_data']['ProfilePage']['0']['graphql']['user']['edge_owner_to_timeline_media']['edges'];
    $likes = [];
    $comments = [];

    foreach ($posts as $post) {
        $likes[] = $post['node']['edge_media_preview_like']['count'];
        $comments[] = $post['node']['edge_media_to_comment']['count'];
    }

    if ($likes) {
        $er = (array_sum($likes) + array_sum($comments))/ count($likes) / $followedBy;
        // raw
        // return $er;

        // formated
        return number_format($er * 100, 2).'%';
    }

    return 'ERR!';
}