<?php
class ZipFile 
{ 
	var $datasec = array(); 
	var $ctrl_dir = array(); 
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; 
	var $old_offset = 0; 
	var $proc_count=0; 
	var $makeDirCount; 

    function add_dir($name) 
	{ 
        $name = str_replace("\\", "/", $name); 

        $fr = "\x50\x4b\x03\x04"; 
        $fr .= "\x0a\x00"; 
        $fr .= "\x00\x00"; 
        $fr .= "\x00\x00"; 
        $fr .= "\x00\x00\x00\x00"; 

        $fr .= pack("V",0); 
        $fr .= pack("V",0); 
        $fr .= pack("V",0); 
        $fr .= pack("v", strlen($name) ); 
        $fr .= pack("v", 0 ); 
        $fr .= $name; 
        $fr .= pack("V", 0); 
        $fr .= pack("V", 0); 
        $fr .= pack("V", 0); 

        $this -> datasec[] = $fr; 
        $new_offset = strlen(implode("", $this->datasec)); 

        $cdrec = "\x50\x4b\x01\x02"; 
        $cdrec .="\x00\x00"; 
        $cdrec .="\x0a\x00"; 
        $cdrec .="\x00\x00"; 
        $cdrec .="\x00\x00"; 
        $cdrec .="\x00\x00\x00\x00"; 
        $cdrec .= pack("V",0); 
        $cdrec .= pack("V",0); 
        $cdrec .= pack("V",0); 
        $cdrec .= pack("v", strlen($name) ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $ext = "\x00\x00\x10\x00"; 
        $ext = "\xff\xff\xff\xff"; 
        $cdrec .= pack("V", 16 ); 
        $cdrec .= pack("V", $this -> old_offset ); 
        $cdrec .= $name; 

        $this -> ctrl_dir[] = $cdrec; 
        $this -> old_offset = $new_offset; 
        return; 
    } 

    function add_file($data, $name) 
	{ 
        $fp = fopen($data,"r"); 
        $data = fread($fp,filesize($data)); 
        fclose($fp); 
        $name = str_replace("\\", "/", $name); 
        $unc_len = strlen($data); 
        $crc = crc32($data); 
        $zdata = gzcompress($data); 
        $zdata = substr ($zdata, 2, -4); 
        $c_len = strlen($zdata); 
        $fr = "\x50\x4b\x03\x04"; 
        $fr .= "\x14\x00"; 
        $fr .= "\x00\x00"; 
        $fr .= "\x08\x00"; 
        $fr .= "\x00\x00\x00\x00"; 
        $fr .= pack("V",$crc); 
        $fr .= pack("V",$c_len); 
        $fr .= pack("V",$unc_len); 
        $fr .= pack("v", strlen($name) ); 
        $fr .= pack("v", 0 ); 
        $fr .= $name; 
        $fr .= $zdata; 
        $fr .= pack("V",$crc); 
        $fr .= pack("V",$c_len); 
        $fr .= pack("V",$unc_len); 

        $this -> datasec[] = $fr; 
        $new_offset = strlen(implode("", $this->datasec)); 

        $cdrec = "\x50\x4b\x01\x02"; 
        $cdrec .="\x00\x00"; 
        $cdrec .="\x14\x00"; 
        $cdrec .="\x00\x00"; 
        $cdrec .="\x08\x00"; 
        $cdrec .="\x00\x00\x00\x00"; 
        $cdrec .= pack("V",$crc); 
        $cdrec .= pack("V",$c_len); 
        $cdrec .= pack("V",$unc_len); 
        $cdrec .= pack("v", strlen($name) ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("v", 0 ); 
        $cdrec .= pack("V", 32 ); 
        $cdrec .= pack("V", $this -> old_offset ); 

        $this -> old_offset = $new_offset; 

        $cdrec .= $name; 
        $this -> ctrl_dir[] = $cdrec; 
    } 

    function add_files($files) 
    { 
        foreach($files as $file) 
        { 
            $file = str_replace("//", "/", $file); 
            if (is_file($file))
            { 
                $this->add_file($file,$file); 
            } 
        } 
    } 
     
    function add_dirs($dirs)
	{ 
        $files = $this->read_dir($dirs); 
        $this->add_files($files); 
    } 

	function read_dir($dir) 
	{ 
		$array = array(); 
		$d = dir($dir); 
		while (false !== ($entry = $d->read())) 
		{ 
			if($entry!='.' && $entry!='..') 
			{ 
				$entry = $dir.'/'.$entry; 
				if(is_dir($entry)) 
				{ 
					$array[] = $entry; 
					$array = array_merge($array, $this->read_dir($entry)); 
				}
				else { 
					$array[] = $entry; 
				} 
			} 
		} 
		$d->close(); 
		return $array; 
	} 

    function file()
	{ 
        $data = implode('', $this -> datasec); 
        $ctrldir = implode('', $this -> ctrl_dir); 

        return 
        $data . 
        $ctrldir . 
        $this -> eof_ctrl_dir . 
        pack("v", sizeof($this -> ctrl_dir)) . 
        pack("v", sizeof($this -> ctrl_dir)) . 
        pack("V", strlen($ctrldir)) . 
        pack("V", strlen($data)) . "\x00\x00"; 
    } 
} 
?>