| @copyright 2007-2026 (c) AVE.cms
| @link https://ave-cms.ru
| @version 3.3
*/
namespace App\Helpers;
if (! defined("BASEPATH"))
{
die ('Direct access to this location is not allowed.');
}
class Html
{
/** Remove inline CSS from an HTML fragment, leaving other attributes and elements intact. */
public static function removeInlineStyles($html)
{
$html = (string) $html;
if (stripos($html, 'style') === false) { return array('html' => $html, 'removed' => 0); }
$previous = libxml_use_internal_errors(true);
try {
$dom = new \DOMDocument('1.0', 'UTF-8');
if (!$dom->loadHTML('' . $html . '', LIBXML_NONET)) {
throw new \InvalidArgumentException('Не удалось разобрать HTML описания');
}
$nodes = (new \DOMXPath($dom))->query('//*[@style]');
$count = $nodes->length;
if (!$count) { return array('html' => $html, 'removed' => 0); }
foreach ($nodes as $node) { $node->removeAttribute('style'); }
$body = $dom->getElementsByTagName('body')->item(0);
if (!$body) { throw new \InvalidArgumentException('Не удалось разобрать HTML описания'); }
$result = '';
foreach ($body->childNodes as $node) { $result .= $dom->saveHTML($node); }
return array('html' => $result, 'removed' => $count);
} finally {
libxml_clear_errors();
libxml_use_internal_errors($previous);
}
}
protected function __construct()
{
//
}
/*
|--------------------------------------------------------------------------------------
| Функция делает html в 1 строчку, удаляет лишние пробелы, комментарии и т.д.
|--------------------------------------------------------------------------------------
|
| @param string $data
| @return string
|
*/
public static function compressHtml (string $data)
{
//remove redundant (white-space) characters
$replace = [
//remove tabs before and after HTML tags
'/\>[^\S ]+/s' => '>',
'/[^\S ]+\ '<',
//shorten multiple whitespace sequences; keep new-line characters because they matter in JS!!!
'/([\t ])+/s' => ' ',
//remove leading and trailing spaces
'/^([\t ])+/m' => '',
'/([\t ])+$/m' => '',
// remove JS line comments (simple only); do NOT remove lines containing URL (e.g. 'src="http://server.com/"')!!!
'~//[a-zA-Z0-9 ]+$~m' => '',
//remove empty lines (sequence of line-end and white-space characters)
'/[\r\n]+([\t ]?[\r\n]+)+/s' => "\n",
//remove empty lines (between HTML tags); cannot remove just any line-end characters because in inline JS they can matter!
'/\>[\r\n\t ]+\ '><',
//remove "empty" lines containing only JS's block end character; join with next line (e.g. "}\n}\n" --> "}}\n"
'/}[\r\n\t ]+/s' => '}',
'/}[\r\n\t ]+,[\r\n\t ]+/s' => '},',
//remove new-line after JS's function or condition start; join with next line
'/\)[\r\n\t ]?{[\r\n\t ]+/s' => '){',
'/,[\r\n\t ]?{[\r\n\t ]+/s' => ',{',
//remove new-line after JS's line end (only most obvious and safe cases)
'/\),[\r\n\t ]+/s' => '),',
//remove quotes from HTML attributes that does not contain spaces; keep quotes around URLs!
'~([\r\n\t ])?([a-zA-Z0-9]+)="([a-zA-Z0-9_/\\-]+)"([\r\n\t ])?~s' => '$1$2=$3$4' //$1 and $4 insert first white-space character found before/after attribute
];
return preg_replace(array_keys($replace), array_values($replace), $data);
}
/*
|--------------------------------------------------------------------------------------
| Функция делает html в 1 строчку, удаляет лишние пробелы, комментарии и т.д.
|--------------------------------------------------------------------------------------
|
| @param string $data
| @return string
|
*/
public static function compress (string $data)
{
$search = [
'/\>[^\S ]+/s', // strip whitespaces after tags, except space
'/[^\S ]+\/' // remove HTML comments
];
$replace = [
'>',
'<',
' ',
''
];
return preg_replace($search, $replace, $data);
}
/*
|--------------------------------------------------------------------------------------
| Если есть GZIP и есть константа
|--------------------------------------------------------------------------------------
|
| @return void
|
*/
public static function setGzip ()
{
if (! in_array('ob_gzhandler', ob_list_handlers(), 'gzip') && (defined('GZIP_COMPRESSION') && GZIP_COMPRESSION))
{
ob_start('ob_gzhandler');
}
else
{
ob_start();
}
}
/*
|--------------------------------------------------------------------------------------
| Функция делает компрессию данных
|--------------------------------------------------------------------------------------
|
| @param string $data
| @return string
|
*/
public static function output (string $data)
{
$headers = [];
$Gzip = strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false;
if (HTML_COMPRESSION) {
$data = self::compressHtml($data);
}
if ($Gzip && GZIP_COMPRESSION) {
$data = gzencode($data, 9);
$headers[] = 'Content-Encoding: gzip';
}
$headers[] = 'Content-Type: text/html; charset=utf-8';
$headers[] = 'Cache-Control: must-revalidate';
if (OUTPUT_EXPIRE) {
$headers[] = 'Expires: ' . gmdate("D, d M Y H:i:s", time() + OUTPUT_EXPIRE_OFFSET) . ' GMT';
}
$headers[] = 'Content-Length: ' . strlen($data);
$headers[] = 'Vary: Accept-Encoding';
Request::setHeaders($headers);
unset($headers);
return $data;
}
/*
|--------------------------------------------------------------------------------------
| Замена переносов на
|--------------------------------------------------------------------------------------
|
| @param string $string
| @return string
|
*/
public static function nl2br ($string)
{
$string = str_replace(array("\r\n", "\r", "\n"), '
', $string);
return $string;
}
/*
|--------------------------------------------------------------------------------------
|
|--------------------------------------------------------------------------------------
|
| @param string $string
| @return string
|
*/
public static function htmlDecode ( $string )
{
return html_entity_decode( $string, ENT_QUOTES );
}
/*
|--------------------------------------------------------------------------------------
|
|--------------------------------------------------------------------------------------
|
| @param string $string
| @return string
|
*/
public static function htmlEncode ( $string )
{
return htmlentities( $string, ENT_QUOTES );
}
public static function buildQuery( $query )
{
$query_array = [];
foreach( $query as $key => $key_value )
{
$query_array[] = urlencode( $key ) . '=' . urlencode( $key_value );
}
return implode( '&', $query_array );
}
public static function appendQuery ( $url, $query )
{
$relativeScheme = false;
if (strpos($url, '://') === 0)
{
$relativeScheme = true;
$url = 'a' . $url;
}
$newUrl = $url . '?' . self::buildQuery( $query );
if ($relativeScheme)
{
return substr($newUrl, 1);
}
return $newUrl;
}
protected function __clone ()
{
//
}
protected function __wakeup ()
{
//
}
}