La clase zipeador y su uso

Para crear un zip con php utilizaremos la siguiente clase:

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;

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 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";

}

}

Y su uso (ejemplo):

include("_SCRIPTS/conexionBD.php");
include_once("_CLASS/templates.class.php");
$templates = new templates($mysql);
$id = $_REQUEST['id'];
$data = $templates->getTemplate($id);

$suruta = _RUTA_IMGS_NEWSLETTERS_;
include_once("_CLASS/newsletters.class.php");
$newsletters = new newsletters($mysql);
$data = $newsletters->getNewsletter($id);

$archivo = "newsletter.html";
$ruta = _DOMINI_SITE_ . _RUTA_SITE_ . $suruta . $data['carpeta'] . "/";

$contenido = urlAbsolutas($data['html'], $ruta);

contenido = ($data['nope'] != "") ? nope($contenido, $data['nope']) : $contenido;
$contenido = ($data['omniture'] != "") ? omniture($contenido, $data['omniture']) : $contenido;

$fch = fopen($archivo, "w");
fwrite($fch, $contenido);
fclose($fch);

require_once('_CLASS/zipeador.class.php');ame = "newsletter.zip";
$zipTest = new zipfile();
$zipTest->add_file($archivo, $archivo);

header("Content-type: application/octet-stream");
header("Content-disposition: attachment; filename=" . $archivoName);
echo $zipTest->file();