无法上传使用GD库的PHP图像(unable to upload an image using gd

这个PHP文件从那里的用户会上传自己的计算机图像的HTML文件接收数据，一旦更新按钮按下此PHP页面返回其中指出，没有这样的文件或目录中存在错误

 <?php error_reporting(E_ALL); ini_set('display_errors', 1);?> <?php $db = mysql_connect('localhost', 'pippo', 'pluto') or die ('Unable to connect. Check your connection parameters.'); mysql_select_db('moviesite', $db) or die(mysql_error($db)); // current images folder $dir ='image_php/images'; // make sure the upload succeeded if ($_FILES['uploadfile']['error'] != UPLOAD_ERR_OK) { switch ($_FILES['uploadfile']['error']) { case UPLOAD_ERR_INI_SIZE: die('The uploaded file exceeds the upload_max_filesize directive' . 'in php.ini'); break; case UPLOAD_ERR_FORM_SIZE: die('The uploaded file exceeds the MAX_FILE_SIZE directive that ' . 'was specified in the HTML form.'); break; case UPLOAD_ERR_PARTIAL: die('The uploaded file was only partially uploaded.'); break; case UPLOAD_ERR_NO_FILE: die('No file was uploaded'); break; case ULOAD_ERR_NO_TMP_DIR: die('The server is missing a temporary folder'); break; case UPLOAD_ERR_CANT_WRITE: die('The Server failed to write the uploaded file to disk'); break; case UPLOAD_ERR_EXTENSION: die('File upload stopped by extension.'); break; } } // retrieve data from created image $image_caption = $_POST['caption']; $image_username = $_POST['username']; $image_date = date('Ym-d'); list($width, $height, $type, $attr) = getimagesize($_FILES['uploadfile']['tmp_name']); // make sure the uploaded file is a supported image switch ($type) { case IMAGETYPE_GIF: $image = imagecreatefromgif($_FILES['uploadfile']['tmp_name']) or die('The file you uploaded was not a supported filetype'); $ext = '.gif'; break; case IMAGETYPE_JPEG: $image = imagecreatefromjpeg($_FILES['uploadfile']['tmp_name']) or die('The file you uploaded was not a supported filetype'); $ext = '.jpg'; break; case IMAGETYPE_PNG: $image = imagecreatefrompng($_FILES['uploadfile']['tmp_name']) or die('THe file you uploaded was not a supported filetype'); $ext = '.png'; break; default: die('The file you uploaded was not a supported filetype'); } //insert information into image table $query = 'INSERT INTO images (image_caption, image_username, image_date) VALUES ("' . $image_caption . '", "' . $image_username . '", "' . $image_date . '")'; $result = mysql_query($query, $db) or die(mysql_error($db)); //retrieve image value $last_id = mysql_insert_id(); // use id as image name //per assicurarsi che l'immagine non sovrascriva altre immagini esistenti $imagename = $last_id . $ext; // update image table adding the image final name $query = 'UPDATE images SET image_filename = "' . $imagename . '" WHERE image_id = ' . $last_id; $result = mysql_query($query, $db) or die (mysql_error($db)); // save image switch ($type) { case IMAGETYPE_GIF: imagegif($image, $dir . '/' . $imagename); break; case IMAGETYPE_JPEG: imagejpeg($image, $dir . '/' . $imagename, 100); break; case IMAGETYPE_PNG: imagepng($image, $dir . '/' . $imagename); break; } imagedestroy($image); ?> <html> <head> <title>Here is your pic!</title> </head> <body> <h1>So how does it feel to be famous?</h1> <p>Here is the picture you just uploaded to our servers:</p> <img src="images/<?php echo $imagename; ?>" style="float:left;"> <table> <tr><td>Image Saved as: </td><td><?php echo $imagename; ?></td></tr> <tr><td>Image Type: </td><td><?php echo $ext; ?></td></tr> <tr><td>Height: </td><td><?php echo $height; ?></td></tr> <tr><td>Width: </td><td><?php echo $width; ?></td></tr> <tr><td>Upload Date: </td><td><?php echo $image_date; ?></td></tr> </table> </body> </html>

这是该页面返回错误：

警告：imagejpeg（）：无法打开“image_php /图片/ 9.jpg”写作：在/var/www/html/php/image_php/check_image.php没有这样的文件或目录上线98

这允许上传图片形式

 <html> <head> <title>Upload your pic to our site!</title> <style type="text/css"> <!-- td {vertical-align: top;} --> </style> </head> <body> <form action="check_image.php" method="post" enctype="multipart/form-data"> <table> <tr> <td>Your Username</td> <td><input type="text" name="username" /></td> </tr> <td>Upload Image*</td> <td><input type="file" name="uploadfile" /></td> </tr><tr> <td colspan="2"> <small><em>* Acceptable image formats include: GIF, JPG/JPEG and PNG. </em></small> </td> </tr><tr> <td>Image Caption<br/> </td> <td><input type="text" name="caption" /></td> </tr><tr> <td colspan="2" style="text-align: center;"> <input type="submit" name="submit" value="Upload"/> </td> </tr> </table> </form> </body> </html>

从PHP手册这里：

http://php.net/manual/en/features.file-upload.post-method.php

文件将默认情况下，除非被其他位置已给出php.ini中的upload_tmp_dir指令存储在服务器的默认临时目录。服务器的默认目录可以通过PHP运行所处的环境设置环境变量TMPDIR来改变。用putenv（）从PHP脚本中是行不通的设置它。这个环境变量也可以用来确保其他操作正在对上传的文件，以及。

也许你的HTTP服务器还没有写临时目录的权限或者你的php.ini具有配置为dir其中还没有写权限的临时目录。检查它们。