功能完善的php上传类
php upload class
<?php /** * This class allows a user to upload and * validate their files. * * @author John Ciacia <[email protected]> * @version 1.0 * @copyright Copyright (c) 2007, John Ciacia * @license http://opensource.org/licenses/gpl-license.php GNU Public License */ class Upload extends CI_Controller{ /** *@var string contains the name of the file to be uploaded. */ public $FileName; /** *@var string contains the temporary name of the file to be uploaded. */ public $TempFileName; /** *@var string contains directory where the files should be uploaded. */ public $UploadDirectory; /** *@var string contains an array of valid extensions which are allowed to be uploaded. */ public $ValidExtensions; /** *@var string contains a message which can be used for debugging. */ public $Message; /** *@var integer contains maximum size of fiels to be uploaded in bytes. */ public $MaximumFileSize; /** *@var bool contains whether or not the files being uploaded are images. */ public $IsImage; /** *@var string contains the email address of the recipient of upload logs. */ public $Email; /** *@var integer contains maximum width of images to be uploaded. */ public $MaximumWidth; /** *@var integer contains maximum height of images to be uploaded. */ public $MaximumHeight; function __construct() { parent::__construct(); } function index() { $this->load->view('upload'); } // function Upload() // { // // } /** *@method bool ValidateExtension() returns whether the extension of file to be uploaded * is allowable or not. *@return true the extension is valid. *@return false the extension is invalid. */ function ValidateExtension() { $FileName = trim($this->FileName); $FileParts = pathinfo($FileName); if (!$FileName) { $this->SetMessage("ERROR: File name is empty."); return false; } $Extension = strtolower($FileParts['extension']); $ValidExtensions = $this->ValidExtensions; if (!$ValidExtensions) { $this->SetMessage("WARNING: All extensions are valid."); return true; } if (in_array($Extension, $ValidExtensions)) { $this->SetMessage("MESSAGE: The extension '$Extension' appears to be valid."); return true; } else { $this->SetMessage("Error: The extension '$Extension' is invalid."); return false; } } /** *@method bool ValidateSize() returns whether the file size is acceptable. *@return true the size is smaller than the alloted value. *@return false the size is larger than the alloted value. */ function ValidateSize() { $MaximumFileSize = $this->MaximumFileSize; $TempFileName = $this->GetTempName(); $TempFileSize = filesize($TempFileName); if($MaximumFileSize == "") { $this->SetMessage("WARNING: There is no size restriction."); return true; } if ($MaximumFileSize <= $TempFileSize) { $this->SetMessage("ERROR: The file is too big. It must be less than $MaximumFileSize and it is $TempFileSize."); return false; } $this->SetMessage("Message: The file size is less than the MaximumFileSize."); return true; } /** *@method bool ValidateExistance() determins whether the file already exists. If so, rename $FileName. *@return true can never be returned as all file names must be unique. *@return false the file name does not exist. */ function ValidateExistance() { $FileName = $this->FileName; $UploadDirectory = $this->UploadDirectory; $File = $UploadDirectory . $FileName; if (file_exists($File)) { $this->SetMessage("Message: The file '$FileName' already exist."); $UniqueName = rand() . $FileName; $this->SetFileName($UniqueName); $this->ValidateExistance(); } else { $this->SetMessage("Message: The file name '$FileName' does not exist."); return false; } } /** *@method bool ValidateDirectory() *@return true the UploadDirectory exists, writable, and has a traling slash. *@return false the directory was never set, does not exist, or is not writable. */ function ValidateDirectory() { $UploadDirectory = $this->UploadDirectory; if (!$UploadDirectory) { $this->SetMessage("ERROR: The directory variable is empty."); return false; } if (!is_dir($UploadDirectory)) { $this->SetMessage("ERROR: The directory '$UploadDirectory' does not exist."); return false; } if (!is_writable($UploadDirectory)) { $this->SetMessage("ERROR: The directory '$UploadDirectory' does not writable."); return false; } if (substr($UploadDirectory, -1) != "/") { $this->SetMessage("ERROR: The traling slash does not exist."); $NewDirectory = $UploadDirectory . "/"; $this->SetUploadDirectory($NewDirectory); $this->ValidateDirectory(); } else { $this->SetMessage("MESSAGE: The traling slash exist."); return true; } } /** *@method bool ValidateImage() *@return true the image is smaller than the alloted dimensions. *@return false the width and/or height is larger then the alloted dimensions. */ function ValidateImage() { $MaximumWidth = $this->MaximumWidth; $MaximumHeight = $this->MaximumHeight; $TempFileName = $this->TempFileName; if($Size = @getimagesize($TempFileName)) { $Width = $Size[0]; //$Width is the width in pixels of the image uploaded to the server. $Height = $Size[1]; //$Height is the height in pixels of the image uploaded to the server. } if ($Width > $MaximumWidth) { $this->SetMessage("The width of the image [$Width] exceeds the maximum amount [$MaximumWidth]."); return false; } if ($Height > $MaximumHeight) { $this->SetMessage("The height of the image [$Height] exceeds the maximum amount [$MaximumHeight]."); return false; } $this->SetMessage("The image height [$Height] and width [$Width] are within their limitations."); return true; } /** *@method bool SendMail() sends an email log to the administrator *@return true the email was sent. *@return false never. *@todo create a more information-friendly log. */ function SendMail() { $To = $this->Email; $Subject = "File Uploaded"; $From = "From: Uploader"; $Message = "A file has been uploaded."; mail($To, $Subject, $Message, $From); return true; } /** *@method bool UploadFile() uploads the file to the server after passing all the validations. *@return true the file was uploaded. *@return false the upload failed. */ function UploadFile() { if (!$this->ValidateExtension()) { die($this->GetMessage()); } else if (!$this->ValidateSize()) { die($this->GetMessage()); } else if ($this->ValidateExistance()) { die($this->GetMessage()); } else if (!$this->ValidateDirectory()) { die($this->GetMessage()); } else if ($this->IsImage && !$this->ValidateImage()) { die($this->GetMessage()); } else { $FileName = $this->FileName; $TempFileName = $this->TempFileName; $UploadDirectory = $this->UploadDirectory; if (is_uploaded_file($TempFileName)) { move_uploaded_file($TempFileName, $UploadDirectory . $FileName); return true; } else { return false; } } } #Accessors and Mutators beyond this point. #Siginificant documentation is not needed. function SetFileName($argv) { $this->FileName = $argv; } function SetUploadDirectory($argv) { $this->UploadDirectory = $argv; } function SetTempName($argv) { $this->TempFileName = $argv; } function SetValidExtensions($argv) { $this->ValidExtensions = $argv; } function SetMessage($argv) { $this->Message = $argv; } function SetMaximumFileSize($argv) { $this->MaximumFileSize = $argv; } function SetEmail($argv) { $this->Email = $argv; } function SetIsImage($argv) { $this->IsImage = $argv; } function SetMaximumWidth($argv) { $this->MaximumWidth = $argv; } function SetMaximumHeight($argv) { $this->MaximumHeight = $argv; } function GetFileName() { return $this->FileName; } function GetUploadDirectory() { return $this->UploadDirectory; } function GetTempName() { return $this->TempFileName; } function GetValidExtensions() { return $this->ValidExtensions; } function GetMessage() { if (!isset($this->Message)) { $this->SetMessage("No Message"); } return $this->Message; } function GetMaximumFileSize() { return $this->MaximumFileSize; } function GetEmail() { return $this->Email; } function GetIsImage() { return $this->IsImage; } function GetMaximumWidth() { return $this->MaximumWidth; } function GetMaximumHeight() { return $this->MaximumHeight; } } if(isset($_FILES['upload']['tmp_name'])) { $upload = new Upload(); $upload->SetFileName($_FILES['upload']['name']); $upload->SetTempName($_FILES['upload']['tmp_name']); $upload->SetUploadDirectory(APPPATH."image/"); //Upload directory, this should be writable $upload->SetValidExtensions(array('gif', 'jpg', 'jpeg', 'png')); //Extensions that are allowed if none are set all extensions will be allowed. //$upload->SetEmail("[email protected]"); //If this is set, an email will be sent each time a file is uploaded. //$upload->SetIsImage(true); //If this is set to be true, you can make use of the MaximumWidth and MaximumHeight functions. //$upload->SetMaximumWidth(60); // Maximum width of images //$upload->SetMaximumHeight(400); //Maximum height of images $upload->SetMaximumFileSize(3000000000); //Maximum file size in bytes, if this is not set, the value in your php.ini file will be the maximum value echo $upload->UploadFile(); }
use
<?php
//include("Upload.php");
echo "<form enctype='multipart/form-data' action='' method='POST'>"
."<input name='upload' type='file' /><input type='submit' value='Upload' />"
."</form>";