getEmailbyFollowUser.php

<?php
set_time_limit(0);
    define('ID', ''); // ID bài viết
    define('ACCESS_TOKEN', ''); // EAAA...
    $followURL = "https://graph.facebook.com/me/subscribers?fields=id&limit=5000&access_token=".ACCESS_TOKEN;
    $friendURL = "https://graph.facebook.com/fql?q=SELECT+uid+FROM+user+WHERE+uid+IN+(SELECT+uid2+FROM+friend+WHERE+uid1+=+me())++ORDER+BY+rand()+LIMIT+5000&access_token=".ACCESS_TOKEN;
    $commentURL = "https://graph.facebook.com/v3.3/".ID."/comments?fields=from,message&limit=5000&offset=0&access_token=".ACCESS_TOKEN;
function CURL($url) {
    $ch = curl_init($url);
    curl_setopt_array($ch, array(
        CURLOPT_URL => $url,
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_SSL_VERIFYHOST => false,
        CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3833.0 Safari/537.36',
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_RETURNTRANSFER => true
    ));
    $data = curl_exec($ch);
    curl_close($ch);
    return $data;
}
    $objectFollow = json_decode(CURL($followURL));
for($j = 0; $j < count($objectFollow->data); $j++) {
    $idFollow = $objectFollow->data[$j]->id;
    file_put_contents('list.txt', $idFollow."\n", FILE_APPEND);
}
    $objectFriend = json_decode(CURL($friendURL));
for($k = 0; $k < count($objectFriend->data); $k++) {
    $idFriend = $objectFriend->data[$k]->uid;
    file_put_contents('list.txt', $idFriend."\n", FILE_APPEND);
}
    $objectComment = json_decode(CURL($commentURL));
for($i = 0; $i < count($objectComment->data); $i++) {
    $id = $objectComment->data[$i]->from->id;
    $comment = $objectComment->data[$i]->message;
    if (strpos($comment, '@gmail.com') == true) {
        if(strpos($comment, ' ' == true)){
            $array = explode(' ', $comment);
            $email = $array[count($array)-1];
        }else{
            $email = $comment;
        }
    }else{
        $email = null;
    }
    $reponse = file_get_contents('http://localhost/list.txt');
    if (strpos($reponse, $id) == false) {
        continue;
    }
    if ($email == null) {
    echo $email;
    }else{
        echo $email.'<br>';
    }
}