common.php

<?php

date_default_timezone_set('UTC');
ini_set( 'default_charset', 'UTF-8');

error_reporting(E_ALL ^ E_NOTICE);


// punctuation and stopword collections
$punctuation = array("\s","\.",",","!","\?",":",";","\/","\\","#","@","&","\^","\$","\|","`","~","=","\+","\*","\"","'","\(","\)","\]","\[","\{","\}","<",">","�");
$stopwords = array("a", "about", "above", "above", "across", "after", "afterwards", "again", "against", "all", "almost", "alone", "along", "already", "also","although","always","am","among", "amongst", "amoungst", "amount",  "an", "and", "another", "any","anyhow","anyone","anything","anyway", "anywhere", "are", "around", "as",  "at", "back","be","became", "because","become","becomes", "becoming", "been", "before", "beforehand", "behind", "being", "below", "beside", "besides", "between", "beyond", "bill", "both", "bottom","but", "by", "call", "can", "cannot", "cant", "co", "con", "could", "couldnt", "cry", "de", "describe", "detail", "do", "done", "down", "due", "during", "each", "eg", "eight", "either", "eleven","else", "elsewhere", "empty", "enough", "etc", "even", "ever", "every", "everyone", "everything", "everywhere", "except", "few", "fifteen", "fify", "fill", "find", "fire", "first", "five", "for", "former", "formerly", "forty", "found", "four", "from", "front", "full", "further", "get", "give", "go", "had", "has", "hasnt", "have", "he", "hence", "her", "here", "hereafter", "hereby", "herein", "hereupon", "hers", "herself", "him", "himself", "his", "how", "however", "hundred", "ie", "if", "in", "inc", "indeed", "interest", "into", "is", "it", "its", "itself", "keep", "last", "latter", "latterly", "least", "less", "ltd", "made", "many", "may", "me", "meanwhile", "might", "mill", "mine", "more", "moreover", "most", "mostly", "move", "much", "must", "my", "myself", "name", "namely", "neither", "never", "nevertheless", "next", "nine", "no", "nobody", "none", "noone", "nor", "not", "nothing", "now", "nowhere", "of", "off", "often", "on", "once", "one", "only", "onto", "or", "other", "others", "otherwise", "our", "ours", "ourselves", "out", "over", "own","part", "per", "perhaps", "please", "put", "rather", "re", "same", "see", "seem", "seemed", "seeming", "seems", "serious", "several", "she", "should", "show", "side", "since", "sincere", "six", "sixty", "so", "some", "somehow", "someone", "something", "sometime", "sometimes", "somewhere", "still", "such", "system", "take", "ten", "than", "that", "the", "their", "them", "themselves", "then", "thence", "there", "thereafter", "thereby", "therefore", "therein", "thereupon", "these", "they", "thickv", "thin", "third", "this", "those", "though", "three", "through", "throughout", "thru", "thus", "to", "together", "too", "top", "toward", "towards", "twelve", "twenty", "two", "un", "under", "until", "up", "upon", "us", "very", "via", "was", "we", "well", "were", "what", "whatever", "when", "whence", "whenever", "where", "whereafter", "whereas", "whereby", "wherein", "whereupon", "wherever", "whether", "which", "while", "whither", "who", "whoever", "whole", "whom", "whose", "why", "will", "with", "within", "without", "would", "yet", "you", "your", "yours", "yourself", "yourselves", "the");
	
$callcount = 0;

// some common functions
function doAPIRequest($url) {
	
	global $callcount, $apikey;

	$url .= "&key=" . $apikey;

	$callcount++;
	
	$run = true;
	$errorcount = 0;
	
	while($run == true) {
		
		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		
		$reply = curl_exec($ch);
		$info = curl_getinfo($ch);

		if($reply != false) {
			$run = false;
			$reply = json_decode($reply);
			if(isset($reply->error)) {
				if($reply->error->errors[0]->reason == "backendError") {
					echo("<br /><br />YouTube's API reported 'backendError'. The tool will wait and try again.<br /><br />");
					sleep(10);
					continue;
				} elseif($reply->error->errors[0]->reason == "quotaExceeded") {
					echo("<br /><br />YouTube's API reported 'quotaExceeded'. This means that too many users have used the tool too hard and our daily request quota has been exceeded.
					Please try again tomorrow and consider making less data-heavy requests.<br /><br />");
					exit;
				} elseif($reply->error->errors[0]->reason == "notFound") {
					echo("<br /><br />YouTube's API reported 'notFound'. The tool will skip this item.<br /><br />");
					sleep(1);
					return $reply;
				} elseif($reply->error->errors[0]->reason == "playlistNotFound") {
					echo("<br /><br />YouTube's API reported 'playlistNotFound'. The tool will skip this item.<br /><br />");
					sleep(1);
					return $reply;
				} elseif($reply->error->errors[0]->reason != "subscriptionForbidden") {
					echo("<br /><br />The request failed. YouTube's API gave the following error: " . $reply->error->errors[0]->reason);
					exit;
				} else {
					return $reply;
				}
			} else {
				return $reply;
			}
		} else {
			$errorcount++;
			if($errorcount > 10) {
				echo("Too many connection errors. Please try again later.");
				exit;
			}
			sleep(1);
		}
	}
}


function testcaptcha($response) {
	
	global $secret;
	
	$ch = curl_init();

	curl_setopt($ch, CURLOPT_URL, "https://www.google.com/recaptcha/api/siteverify");
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_POST, true);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_POSTFIELDS,"secret=".$secret."&response=".$response);
	
	$reply = json_decode(curl_exec($ch));
	
	curl_close($ch);
	
	if($reply->success != 1) {
		echo "Recaptcha failed.";
		exit;
	} 
}


function writefile($filename,$content) {
	
	global $callcount;
	
	file_put_contents($filename,$content);
	
	$message = date("Y-m-d H:i:s") . "  " . $callcount . " " . get_client_ip_server() .  " " . $filename . "\n";
	
	file_put_contents("writefile.log", $message, FILE_APPEND);
}


function out($msg) {

	if(WEBMODE) {
		echo $msg;
		flush(); ob_flush();
	} else {
		$msg = preg_replace('/\<br \/\>/',PHP_EOL,$msg);
		echo $msg;
	}
}


function outweb($msg) {

	if(WEBMODE) {
		echo $msg;
		flush(); ob_flush();
	}
}


function get_client_ip_server() {

    if ($_SERVER['HTTP_CLIENT_IP'])
        $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
    else if($_SERVER['HTTP_X_FORWARDED_FOR'])
        $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else if($_SERVER['HTTP_X_FORWARDED'])
        $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
    else if($_SERVER['HTTP_FORWARDED_FOR'])
        $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
    else if($_SERVER['HTTP_FORWARDED'])
        $ipaddress = $_SERVER['HTTP_FORWARDED'];
    else if($_SERVER['REMOTE_ADDR'])
        $ipaddress = $_SERVER['REMOTE_ADDR'];
    else
        $ipaddress = 'UNKNOWN';
 
    return $ipaddress;
}
	
?>