Creare un file Zip in una determinata cartella

[angelomorto]

Ho scaricato da internet questa classe per creare il file zip che mi serve....

/**
 * Class to dynamically create a zip file (archive)
 *
 * @author Rochak Chauhan
 */

class createZip  {  

    public $compressedData = array(); 
    public $centralDirectory = array(); // central directory   
    public $endOfCentralDirectory = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
    public $oldOffset = 0;

    /**
     * Function to create the directory where the file(s) will be unzipped
     *
     * @param $directoryName string 
     *
     */
    
    public function addDirectory($directoryName) {
        $directoryName = str_replace("\\\\", "/", $directoryName);  

        $feedArrayRow = "\x50\x4b\x03\x04";
        $feedArrayRow .= "\x0a\x00";    
        $feedArrayRow .= "\x00\x00";    
        $feedArrayRow .= "\x00\x00";    
        $feedArrayRow .= "\x00\x00\x00\x00"; 

        $feedArrayRow .= pack("V",0); 
        $feedArrayRow .= pack("V",0); 
        $feedArrayRow .= pack("V",0); 
        $feedArrayRow .= pack("v", strlen($directoryName) ); 
        $feedArrayRow .= pack("v", 0 ); 
        $feedArrayRow .= $directoryName;  

        $feedArrayRow .= pack("V",0); 
        $feedArrayRow .= pack("V",0); 
        $feedArrayRow .= pack("V",0); 

        $this -> compressedData[] = $feedArrayRow;
        
        $newOffset = strlen(implode("", $this->compressedData));

        $addCentralRecord = "\x50\x4b\x01\x02";
        $addCentralRecord .="\x00\x00";    
        $addCentralRecord .="\x0a\x00";    
        $addCentralRecord .="\x00\x00";    
        $addCentralRecord .="\x00\x00";    
        $addCentralRecord .="\x00\x00\x00\x00"; 
        $addCentralRecord .= pack("V",0); 
        $addCentralRecord .= pack("V",0); 
        $addCentralRecord .= pack("V",0); 
        $addCentralRecord .= pack("v", strlen($directoryName) ); 
        $addCentralRecord .= pack("v", 0 ); 
        $addCentralRecord .= pack("v", 0 ); 
        $addCentralRecord .= pack("v", 0 ); 
        $addCentralRecord .= pack("v", 0 ); 
        $ext = "\x00\x00\x10\x00";
        $ext = "\xff\xff\xff\xff";  
        $addCentralRecord .= pack("V", 16 ); 

        $addCentralRecord .= pack("V", $this -> oldOffset ); 
        $this -> oldOffset = $newOffset;
        //$directoryName = str_replace($archivio.'/','',$directoryName);
        $addCentralRecord .= $directoryName;  

        $this -> centralDirectory[] = $addCentralRecord;  
    }     
    
    /**
     * Function to add file(s) to the specified directory in the archive 
     *
     * @param $directoryName string 
     *
     */
    
    public function addFile($data, $directoryName)   {
 
        $directoryName = str_replace("\\\\", "/", $directoryName);  
    
        $feedArrayRow = "\x50\x4b\x03\x04";
        $feedArrayRow .= "\x14\x00";    
        $feedArrayRow .= "\x00\x00";    
        $feedArrayRow .= "\x08\x00";    
        $feedArrayRow .= "\x00\x00\x00\x00"; 

        $uncompressedLength = strlen($data);  
        $compression = crc32($data);  
        $gzCompressedData = gzcompress($data);  
        $gzCompressedData = substr( substr($gzCompressedData, 0, strlen($gzCompressedData) - 4), 2); 
        $compressedLength = strlen($gzCompressedData);  
        $feedArrayRow .= pack("V",$compression); 
        $feedArrayRow .= pack("V",$compressedLength); 
        $feedArrayRow .= pack("V",$uncompressedLength); 
        $feedArrayRow .= pack("v", strlen($directoryName) ); 
        $feedArrayRow .= pack("v", 0 ); 
        $feedArrayRow .= $directoryName;  

        $feedArrayRow .= $gzCompressedData;  

        $feedArrayRow .= pack("V",$compression); 
        $feedArrayRow .= pack("V",$compressedLength); 
        $feedArrayRow .= pack("V",$uncompressedLength); 

        $this -> compressedData[] = $feedArrayRow;

        $newOffset = strlen(implode("", $this->compressedData));

        $addCentralRecord = "\x50\x4b\x01\x02";
        $addCentralRecord .="\x00\x00";    
        $addCentralRecord .="\x14\x00";    
        $addCentralRecord .="\x00\x00";    
        $addCentralRecord .="\x08\x00";    
        $addCentralRecord .="\x00\x00\x00\x00"; 
        $addCentralRecord .= pack("V",$compression); 
        $addCentralRecord .= pack("V",$compressedLength); 
        $addCentralRecord .= pack("V",$uncompressedLength); 
        $addCentralRecord .= pack("v", strlen($directoryName) ); 
        $addCentralRecord .= pack("v", 0 );
        $addCentralRecord .= pack("v", 0 );
        $addCentralRecord .= pack("v", 0 );
        $addCentralRecord .= pack("v", 0 );
        $addCentralRecord .= pack("V", 32 ); 

        $addCentralRecord .= pack("V", $this -> oldOffset ); 
        $this -> oldOffset = $newOffset;

        $addCentralRecord .= $directoryName;  

        $this -> centralDirectory[] = $addCentralRecord;  
    }

    /**
     * Fucntion to return the zip file
     *
     * @return zipfile (archive)
     */

    public function getZippedfile() { 

        $data = implode("", $this -> compressedData);  
        $controlDirectory = implode("", $this -> centralDirectory);  

        return   
            $data.  
            $controlDirectory.  
            $this -> endOfCentralDirectory.  
            pack("v", sizeof($this -> centralDirectory)).     
            pack("v", sizeof($this -> centralDirectory)).     
            pack("V", strlen($controlDirectory)).             
            pack("V", strlen($data)).                
            "\x00\x00";                             
    }

    /**
     *
     * Function to force the download of the archive as soon as it is created
     *
     * @param archiveName string - name of the created archive file
     */

    public function forceDownload($archiveName) {
        $headerInfo = '';
         
        if(ini_get('zlib.output_compression')) {
            ini_set('zlib.output_compression', 'Off');
        }

        // Security checks
        if( $archiveName == "" ) {
            echo "<html><title>Public Photo Directory - Download </title><body>
[B]ERROR:[/B] The download file was NOT SPECIFIED.</body></html>";
            exit;
        } 
        elseif ( ! file_exists( $archiveName ) ) {
            echo "<html><title>Public Photo Directory - Download </title><body>
[B]ERROR:[/B] File not found.</body></html>";
            exit;
        }

        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: private",false);
        header("Content-Type: application/zip");
        header("Content-Disposition: attachment; filename=".basename($archiveName).";" );
        header("Content-Transfer-Encoding: binary");
        header("Content-Length: ".filesize($archiveName));
        readfile("$archiveName");
        
     }

} 

l'esempio per il suo utilizzo è questo...

<?php

include_once("createZip.inc.php");
$createZip = new createZip;  

$createZip -> addDirectory("dir/");

$fileContents = file_get_contents("img.jpg");  
$createZip -> addFile($fileContents, "dir/img.jpg");  


$fileName = "archive.zip";
$fd = fopen ($fileName, "wb");
$out = fwrite ($fd, $createZip -> getZippedfile());
fclose ($fd);

$createZip -> forceDownload($fileName);
@unlink($fileName);
?>

...il mio problema ora è questo....la classe crea un file archive.zip nella stessa cartella in cui si trova il file PHP che richiama la classe....quindi se il mio file index.php che si trova nella root richiama la classe per creare il file compresso, questo mi crea il file archive.zip nella root....

....ora come faccio a dirgli che il file lo deve creare all'interno della cartella, ad esempio, "archivio"?????
Qualcuno sa darmi una mano??? :master: