<?php 
class iCal {  

    private $ics_files = array(); 
     
    function iCal($ics_files) { 
        $this->ics_files = $ics_files;
    } 
     
    function iCalList() { 
            return array_filter($this->ics_files, array($this,"iCalClean")); 
    } 
     
    function iCalClean($file) { 
            return strpos($file, '.ics'); 
    } 
     
    function iCalReader() { 
    	$iCaltoArray = array();
        $array = $this->iCalList(); 
        foreach ($array as $icalfile) { 
            $iCaltoArray[$icalfile] = $this->iCalDecoder($icalfile); 
        } 
        return $iCaltoArray; 
    } 
     
    function iCalDecoder($file) { 
        $ical = file_get_contents($file); 
        // unfold long lines http://tools.ietf.org/html/rfc5545#section-3.1
        $ical = str_replace("\r\n ", "", $ical);
        preg_match_all('/(BEGIN:VEVENT.*?END:VEVENT)/si', $ical, $result, PREG_PATTERN_ORDER); 
        for ($i = 0; $i < count($result[0]); $i++) { 
            $tmpbyline = explode("\r\n", $result[0][$i]); 
             
            foreach ($tmpbyline as $item) { 
                $tmpholderarray = explode(":",$item, 2); //value can contain ":", so not strip URLs for example
                if (count($tmpholderarray) >1) {  
                    $majorarray[$tmpholderarray[0]] = $tmpholderarray[1]; 
                } 
                 
            } 
            foreach (array ("DESCRIPTION", "SUMMARY", "LOCATION") as $key) {
                $majorarray[$key] = str_replace(array('\\\\', '\\,', '\\;', '\\n', '\\N'), 
                                                array('\\',   ',',   ';',   "\n",  "\n"), $majorarray[$key]);
            }

            $icalarray[] = $majorarray; 
            unset($majorarray); 
              
              
        } 
        return $icalarray; 
    }
         
}