Melbourne Beats

Code: Select all

    private function filterTags($source) { 
        // filter pass setup 
        $preTag = NULL; 
        $postTag = $source; 
        // find initial tag's position 
        $tagOpen_start = strpos($source, '<'); 
        // interate through string until no tags left 
        while($tagOpen_start !== FALSE) { 
            // tag setup 
            $fromTagOpen = substr($postTag, $tagOpen_start); 
            $tagOpen_end = strpos($fromTagOpen, '>'); 
            $tagOpen_nested = (strpos(substr($fromTagOpen, 1), '<')+1); 
            $tagOpen_length = $tagOpen_end - 1; 
            $currentTag = substr($fromTagOpen, 1, $tagOpen_length); 
            // iterate through tag finding attribute pairs - setup 
            $tagLeft = $currentTag; 
            $attrSet = array(); 
            $currentSpace = strpos($tagLeft, ' '); 
            // is end tag 
            if (substr($currentTag, 0, 1) == "/") { 
                $isCloseTag = TRUE; 
                list($tagName) = explode(' ', $currentTag); 
                $tagName = substr($tagName, 1); 
            // is start tag 
            } else { 
                $isCloseTag = FALSE; 
                list($tagName) = explode(' ', $currentTag); 
            }         
             
            // this while is needed to support attribute values with spaces in! 
            while ($currentSpace !== FALSE) { 
                $fromSpace = substr($tagLeft, ($currentSpace+1)); 
                $nextSpace = strpos($fromSpace, ' '); 
                $openQuotes = strpos($fromSpace, '"'); 
                $closeQuotes = strpos(substr($fromSpace, ($openQuotes+1)), '"') + $openQuotes + 1; 
                // another equals exists 
                if (strpos($fromSpace, '=') !== FALSE) { 
                    // opening and closing quotes exists 
                    if (($openQuotes !== FALSE) && (strpos(substr($fromSpace, ($openQuotes+1)), '"') !== FALSE)) 
                        $attr = substr($fromSpace, 0, ($closeQuotes+1)); 
                    // one or neither exist 
                    else $attr = substr($fromSpace, 0, $nextSpace); 
                // no more equals exist 
                } else $attr = substr($fromSpace, 0, $nextSpace); 
                // last attr pair 
                if (!$attr) $attr = $fromSpace; 
                // add to attribute pairs array 
                $attrSet[] = $attr; 
                // next inc 
                $tagLeft = substr($fromSpace, strlen($attr)); 
                $currentSpace = strpos($tagLeft, ' '); 
            } 
            // deals with nexted tags 
            if (($tagOpen_nested < $tagOpen_end) && ($fromTagOpen[$tagOpen_nested] == '<')) { 
                $preTag .= substr($postTag, 0, ($tagOpen_start + ($tagOpen_end - $tagOpen_nested) - 1)); 
                $postTag = substr($fromTagOpen, $tagOpen_nested); 
                $tagOpen_start = strpos($postTag, '<');             
                continue; 
            // doesn't contain nested tag 
            } else $preTag .= substr($postTag, 0, $tagOpen_start); 
            // appears in array specified by user 
            $tagFound = in_array(strtolower($tagName), $this->tagsArray);             
            // remove this tag on condition 
            if ((!$tagFound && $this->tagsMethod) || ($tagFound && !$this->tagsMethod)) { 
                // reconstruct tag with allowed attributes 
                if (!$isCloseTag) { 
                    $attrSet = $this->filterAttr($attrSet); 
                    $preTag .= '<' . $tagName; 
                    for ($i = 0; $i < count($attrSet); $i++) 
                        $preTag .= ' ' . $attrSet[$i]; 
                    // reformat single tags to XHTML 
                    if (strpos($fromTagOpen, "</" . $tagName))    $preTag .= '>'; 
                    else                                                                $preTag .= ' />'; 
                // just the tagname 
                } else $preTag .= '</' . $tagName . '>'; 
            } 
            // find next tag's start 
            $postTag = substr($postTag, ($tagOpen_start + $tagOpen_length + 2)); 
            $tagOpen_start = strpos($postTag, '<');             
        } 
        // append any code after end of tags 
        $preTag .= $postTag; 
        return $preTag; 
    }