照片上传 getimagesize() 警告 - 文件名不能为空

Posted 2023-02-24

【中文标题】照片上传 getimagesize() 警告 - 文件名不能为空

【英文标题】：Photo Upload getimagesize() warning - filename cannot be empty

【发布时间】：2013-07-12 00:36:48

【问题描述】：

我遇到了一个难题，想知道是否有人可以给我一个直接的答案。所以我使用 php/mysql 构建了一个照片上传脚本。在脚本中，照片在上传时会重新调整大小并给定一个临时名称。我使用几张图片（文件大小 220 KB | 960 x 720）对其进行了测试，一切正常。然后我尝试从我的数码相机上传几张照片（文件大小 2.47 MB​​ | 3000 x 4000），突然间我收到了这个错误：

Warning: getimagesize() [function.getimagesize]: Filename cannot be empty in /php_parsers/photo_system.php on line 94

Warning: Cannot modify header information - headers already sent by (output started at /php_parsers/photo_system.php:94) in /php_parsers/photo_system.php on line 96

我在 *** 上查看了一篇有类似问题的帖子，发现了一篇，但它似乎不适用于我遇到的场景。

这里是“photo_system.php”的适用代码。我已经评论了违规的第 94 行和第 96 行。您可以提供的任何帮助/想法将不胜感激！

     <?php 
     if (isset($_FILES["photo"]["name"]) && isset($_POST["gallery"]))
         $sql = "SELECT COUNT(id) FROM photos WHERE user='$log_username'";
         $query = mysqli_query($db_conx, $sql);
         $row = mysqli_fetch_row($query);
         if($row[0] > 79)
             header("location: ../message.php?msg=The system allows only 80 pictures total");
             exit();    
    
    $gallery = preg_replace('#[^a-z 0-9,]#i', '', $_POST["gallery"]);
    $fileName = $_FILES["photo"]["name"];
    $fileTmpLoc = $_FILES["photo"]["tmp_name"];
    $fileType = $_FILES["photo"]["type"];
    $fileSize = $_FILES["photo"]["size"];
    $fileErrorMsg = $_FILES["photo"]["error"];
    $kaboom = explode(".", $fileName);
    $fileExt = end($kaboom);
    $db_file_name = date("DMjGisY")."".rand(1000,9999).".".$fileExt; // WedFeb272120452013RAND.jpg
    list($width, $height) = getimagesize($fileTmpLoc); //Offending Line 94
    if($width < 10 || $height < 10)
        header("location: ../message.php?msg=ERROR: That image has no dimensions"); //Offending Line 96
        exit(); 
    
    if($fileSize > 4194304) 
        header("location: ../message.php?msg=ERROR: Your image file was larger than 4mb");
        exit(); 
     else if (!preg_match("/\.(gif|jpg|png)$/i", $fileName) ) 
        header("location: ../message.php?msg=ERROR: Your image file was not jpg, gif or png type");
        exit();
     else if ($fileErrorMsg == 1) 
        header("location: ../message.php?msg=ERROR: An unknown error occurred");
        exit();
    
    $moveResult = move_uploaded_file($fileTmpLoc, "../user/$log_username/$db_file_name");
    if ($moveResult != true) 
        header("location: ../message.php?msg=ERROR: File upload failed");
        exit();
    
    include_once("../php_includes/image_resize.php");
    $wmax = 800;
    $hmax = 600;
    if($width > $wmax || $height > $hmax)
        $target_file = "../user/$log_username/$db_file_name";
        $resized_file = "../user/$log_username/$db_file_name";
        img_resize($target_file, $resized_file, $wmax, $hmax, $fileExt);
    
    $sql = "INSERT INTO photos(user, gallery, filename, uploaddate) VALUES ('$log_username','$gallery','$db_file_name',now())";
    $query = mysqli_query($db_conx, $sql);
    mysqli_close($db_conx);
    header("location: ../photos.php?u=$log_username");
    exit();

?><?php 
if (isset($_POST["delete"]) && $_POST["id"] != "")
    $id = preg_replace('#[^0-9]#', '', $_POST["id"]);
    $query = mysqli_query($db_conx, "SELECT user, filename FROM photos WHERE id='$id' LIMIT 1");
    $row = mysqli_fetch_row($query);
    $user = $row[0];
    $filename = $row[1];
    if($user == $log_username)
        $picurl = "../user/$log_username/$filename"; 
        if (file_exists($picurl)) 
            unlink($picurl);
            $sql = "DELETE FROM photos WHERE id='$id' LIMIT 1";
            $query = mysqli_query($db_conx, $sql);
        
    
    mysqli_close($db_conx);
    echo "deleted_ok";
    exit();

?>

【参考方案1】：

大家好。我弄清楚了问题所在。希望这将有助于将来的某人。所以我检查了我的phpinfo()，发现upload_max_filesize 只设置为2M。我将 php.ini 添加到有问题的文件的目录中并包含：

upload_max_filesize = 250M
post_max_size = 250M
max_execution_time = 300

date.timezone = "America/Los_Angeles"

我不得不添加 date.timezone，因为我的系统不喜欢我没有定义它的事实。无论如何，这已经解决了这个问题。

【讨论】：

感谢帮助我的好友