30.4. Step 3: Uploading the image file to a server
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## 30.4. Step 3: Uploading the image file to a server

This class assumes that PHP has been built with support for FTP. Since the script is straightforward we do not discuss it any more in details other than noting that we use the default system logger to store information that we have uploaded the file successfully. This is done via the PHP method syslog().

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    <?php
    /**
    * Class FTPUploader
    */
    class FTPUploader {
        private $iserver='', $iuid='',$ipwd='';
        /**
         * Creat new instance of the FTP uploader class
         *
         * @param $aServer The URI for the server
         * @param $aUID The ftp user id
         * @param $aPWD The ftp user password
         * @return FTPUploader
         */
        function __construct($aServer,$aUID,$aPWD) {
            $this->iserver = $aServer;
            $this->iuid = $aUID;
            $this->ipwd = $aPWD;
        }
        /**
         * Upload the specified file to the given directory on the server
         *
         * @param $aFile Name and path of file to uploads
         * @param $aUploadDir The directory on the server where the file should be stored
         */
        function Upload($aFile,$aUploadDir) {
            $conn_id = @ftp_connect($this->iserver);

            if ( !$conn_id ) {
                JpGraphError::Raise("FTP connection failed.\nAttempted to connect to {$this->iserver} for user {$this->iuid}.");
            }

            $login_result = ftp_login($conn_id, $this->iuid, $this->ipwd);
            if ((!$conn_id) || (!$login_result)) {
                JpGraphError::Raise("FTP login has failed.\nAttempted to connect to {$this->iserver} for user {$this->iuid}.",3);
            }

            syslog(LOG_INFO,JpGraphError::GetTitle()."Connected to {$this->iserver}");

            // Delete potential old file
            $ftp_file = $aUploadDir.basename($aFile);
            $res = @ftp_delete($conn_id,$ftp_file);

            // Upload new image
            $upload = ftp_put($conn_id, $ftp_file, $aFile, FTP_BINARY);
            if (!$upload) {
                JpGraphError::Raise("FTP upload of image failed.");
            }

            syslog(LOG_INFO,JpGraphError::GetTitle()."Succesfully uploaded $aFile to {$this->iserver}.");

            @ftp_close($conn_id);
        }
    }
    ?>

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