wallabag/inc/MyTool.class.php

<?php
/**
 * poche, a read it later open source system
 *
 * @category   poche
 * @author     Nicolas Lœuillet <support@inthepoche.com>
 * @copyright  2013
 * @license    http://www.wtfpl.net/ see COPYING file
 */
 
class MyTool
{
    public static function initPhp()
    {
        define('START_TIME', microtime(true));

        if (phpversion() < 5) {
            die("Argh you don't have PHP 5 !");
        }

        error_reporting(E_ALL);

        function stripslashesDeep($value) {
            return is_array($value)
                ? array_map('stripslashesDeep', $value)
                : stripslashes($value);
        }

        if (get_magic_quotes_gpc()) {
            $_POST = array_map('stripslashesDeep', $_POST);
            $_GET = array_map('stripslashesDeep', $_GET);
            $_COOKIE = array_map('stripslashesDeep', $_COOKIE);
        }

        ob_start();
        register_shutdown_function('ob_end_flush');
    }

    public static function isUrl($url)
    {
        // http://neo22s.com/check-if-url-exists-and-is-online-php/
        $pattern='|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i';

        return preg_match($pattern, $url);
    }

    public static function isEmail($email)
    {
        $pattern = "/^[A-Z0-9._%-]+@[A-Z0-9.-]+\.[A-Z]{2, 4}$/i";

        return (preg_match($pattern, $email));
    }

    public static function formatBBCode($text)
    {
        $replace = array(
            '/\[m\](.+?)\[\/m\]/is'
            => '/* moderate */',
            '/\[b\](.+?)\[\/b\]/is'
            => '<strong>$1</strong>',
            '/\[i\](.+?)\[\/i\]/is'
            => '<em>$1</em>',
            '/\[s\](.+?)\[\/s\]/is'
            => '<del>$1</del>',
            '/\[u\](.+?)\[\/u\]/is'
            => '<span style="text-decoration: underline;">$1</span>',
            '/\[url\](.+?)\[\/url]/is'
            => '<a href="$1">$1</a>',
            '/\[url=(\w+:\/\/[^\]]+)\](.+?)\[\/url]/is'
            => '<a href="$1">$2</a>',
            '/\[quote\](.+?)\[\/quote\]/is'
            => '<blockquote>$1</blockquote>',
            '/\[code\](.+?)\[\/code\]/is'
            => '<code>$1</code>',
            '/\[([^[]+)\|([^[]+)\]/is'
            => '<a href="$2">$1</a>'
            );
        $text = preg_replace(
            array_keys($replace),
            array_values($replace),
            $text
        );

        return $text;
    }

    public static function formatText($text)
    {
        $text = preg_replace_callback(
            '/<code_html>(.*?)<\/code_html>/is',
            create_function(
                '$matches',
                'return htmlspecialchars($matches[1]);'
            ),
            $text
        );
        $text = preg_replace_callback(
            '/<code_php>(.*?)<\/code_php>/is',
            create_function(
                '$matches',
                'return highlight_string("<?php $matches[1] ?>", true);'
            ),
            $text
        );
        $text = preg_replace('/<br \/>/is', '', $text);

        $text = preg_replace(
            '#(^|\s)([a-z]+://([^\s\w/]?[\w/])*)(\s|$)#im',
            '\\1<a href="\\2">\\2</a>\\4',
            $text
        );
        $text = preg_replace(
            '#(^|\s)wp:?([a-z]{2}|):([\w]+)#im',
            '\\1<a href="http://\\2.wikipedia.org/wiki/\\3">\\3</a>',
            $text
        );
        $text = str_replace(
            'http://.wikipedia.org/wiki/',
            'http://www.wikipedia.org/wiki/',
            $text
        );
        $text = str_replace('\wp:', 'wp:', $text);
        $text = str_replace('\http:', 'http:', $text);
        $text = MyTool::formatBBCode($text);
        $text = nl2br($text);

        return $text;
    }

    public static function getUrl()
    {
        $https = (!empty($_SERVER['HTTPS'])
                  && (strtolower($_SERVER['HTTPS']) == 'on'))
            || (isset($_SERVER["SERVER_PORT"])
                && $_SERVER["SERVER_PORT"] == '443'); // HTTPS detection.
        $serverport = (!isset($_SERVER["SERVER_PORT"])
                       || $_SERVER["SERVER_PORT"] == '80'
                       || ($https && $_SERVER["SERVER_PORT"] == '443')
                       ? ''
                       : ':' . $_SERVER["SERVER_PORT"]);

        $scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);

        if (!isset($_SERVER["SERVER_NAME"])) {
            return $scriptname;
        }

        return 'http' . ($https ? 's' : '') . '://'
            . $_SERVER["SERVER_NAME"] . $serverport . $scriptname;
    }

    public static function rrmdir($dir)
    {
        if (is_dir($dir) && ($d = @opendir($dir))) {
            while (($file = @readdir($d)) !== false) {
                if ( $file == '.' || $file == '..' ) {
                    continue;
                } else {
                    unlink($dir . '/' . $file);
                }
            }
        }
    }

    public static function humanBytes($bytes)
    {
        $siPrefix = array( 'bytes', 'KB', 'MB', 'GB', 'TB', 'EB', 'ZB', 'YB' );
        $base = 1024;
        $class = min((int) log($bytes, $base), count($siPrefix) - 1);
        $val = sprintf('%1.2f', $bytes / pow($base, $class));

        return $val . ' ' . $siPrefix[$class];
    }

    public static function returnBytes($val)
    {
        $val = trim($val);
        $last = strtolower($val[strlen($val)-1]);
        switch($last)
        {
        case 'g': $val *= 1024;
        case 'm': $val *= 1024;
        case 'k': $val *= 1024;
        }

        return $val;
    }

    public static function getMaxFileSize()
    {
        $sizePostMax = MyTool::returnBytes(ini_get('post_max_size'));
        $sizeUploadMax = MyTool::returnBytes(ini_get('upload_max_filesize'));

        // Return the smaller of two:
        return min($sizePostMax, $sizeUploadMax);
    }

    public static function smallHash($text)
    {
        $t = rtrim(base64_encode(hash('crc32', $text, true)), '=');
        // Get rid of characters which need encoding in URLs.
        $t = str_replace('+', '-', $t);
        $t = str_replace('/', '_', $t);
        $t = str_replace('=', '@', $t);

        return $t;
    }

    public static function renderJson($data)
    {
        header('Cache-Control: no-cache, must-revalidate');
        header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
        header('Content-type: application/json; charset=UTF-8');

        echo json_encode($data);
        exit();
    }

    public static function grabToLocal($url, $file, $force = false)
    {
        if ((!file_exists($file) || $force) && in_array('curl', get_loaded_extensions())){
            $ch = curl_init ($url);
            curl_setopt($ch, CURLOPT_HEADER, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
            $raw = curl_exec($ch);
            if (curl_getinfo($ch, CURLINFO_HTTP_CODE) == 200) {
                $fp = fopen($file, 'x');
                fwrite($fp, $raw);
                fclose($fp);
            }
            curl_close ($ch);
        }
    }

    public static function redirect($rurl = '')
    {
        if ($rurl === '') {
            // if (!empty($_SERVER['HTTP_REFERER']) && strcmp(parse_url($_SERVER['HTTP_REFERER'],PHP_URL_HOST),$_SERVER['SERVER_NAME'])==0)
            $rurl = (empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']);
            if (isset($_POST['returnurl'])) {
                $rurl = $_POST['returnurl'];
            }
        }

        // prevent loop
        if (empty($rurl) || parse_url($rurl, PHP_URL_QUERY) === $_SERVER['QUERY_STRING']) {
            $rurl = MyTool::getUrl();
        }

        if (substr($rurl, 0, 1) !== '?') {
            $ref = MyTool::getUrl();
            if (substr($rurl, 0, strlen($ref)) !== $ref) {
                $rurl = $ref;
            }
        }
        header('Location: '.$rurl);
        exit();
    }

    public static function silence_errors($num, $str)
    {
// No-op
    }
}