Question

这个php文件接收来自html文件的数据，用户从他的计算机上传图像，一旦点击更新按钮，这个php页面就会返回一个错误，其中声明没有这样的文件或目录

<?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'];
$image_date = date('Y-m-d');
list($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>

这是页面返回的错误：

警告：imagejpeg（）：无法打开'image_php / images / 9.jpg'进行写入：第98行的/var/www/html/php/image_php/check_image.php中没有此类文件或目录

允许上传图片的表单

<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>

Answer 1

从PHP手册：

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

默认情况下，文件将存储在服务器的默认临时目录中，除非在php.ini中使用upload_tmp_dir指令给出了另一个位置。可以通过在运行PHP的环境中设置环境变量TMPDIR来更改服务器的默认目录。在PHP脚本中使用putenv（）进行设置将不起作用。此环境变量也可用于确保其他操作正在处理上载的文件。

可能你的HTTP服务器没有temp dir的写权限，或者你的php.ini有一个为dir配置的临时目录，它没有写权限。检查一下。

无法使用gd库php

1 个答案: