Question

我正在尝试上传此处显示的图片w3schools但它始终显示错误

Undefined index: file

这是代码

HTML

<form action="upload.php" method="post"  enctype="multipart/form-data">
    <!-- Upload image -->
    <input type="file" name="file" id="file">
    <input type="submit" value="Upload Image" name="submit">
</form>

PHP

<?php
    if(!isset($_POST["submit"])){
        die('Error');
    }
    $target_dir = "uploads/";
    $target_file = $target_dir . basename($_FILES["file"]["name"]);
    $uploadOk = 1;
    $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
    if(isset($_POST["submit"])) {
        $check = getimagesize($_FILES["file"]["tmp_name"]);
        if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
        } else {
        echo "File is not an image.";
        $uploadOk = 0;
        }
    }
    if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
    }
    if ($_FILES["file"]["size"] > 500000) {
        echo "Sorry, your file is too large.";
        $uploadOk = 0;
    }
    if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType !=   "jpeg"
    && $imageFileType != "gif" ) {
        echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
        $uploadOk = 0;
    }
    if ($uploadOk == 0) {
        echo "Sorry, your file was not uploaded.";
    } else {
        if (move_uploaded_file($_FILES["file"]["tmp_name"], $target_file)) {
            echo "The file ". basename( $_FILES["file"]["name"]). " has been     uploaded.";
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }
?>

Answer 1

如果您使用WAMP或XAMPP，则设置了文件上传限制。如果文件大小超过2mb，则上传将无效。请尝试上传大小小于2mb的图像并查看其是否有效。要更改文件上载限制，请打开php.ini文件并修改此值

的upload_max_filesize = 2M

将2M替换为您希望提供的限制，例如6M或8M

以下链接介绍了如何更改文件上传限制 PHP change the maximum upload file size

Answer 2

您可以像这样使用upload.php，它会起作用。

<?php
$file_exts = array("jpg", "bmp", "jpeg", "gif", "png");
$upload_exts = end(explode(".", $_FILES["file"]["name"]));
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/png")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_FILES["file"]["size"] < 2000000)
&& in_array($upload_exts, $file_exts))
{
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br>";
echo "Type: " . $_FILES["file"]["type"] . "<br>";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";
// Enter your path to upload file here
if (file_exists("c:\wamp\www\upload/newupload/" .
$_FILES["file"]["name"]))
{
echo "<div class='error'>"."(".$_FILES["file"]["name"].")".
" already exists. "."</div>";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"c:\wamp\www\upload/newupload/" . $_FILES["file"]["name"]);
echo "<div class='sucess'>"."Stored in: " .
"c:\wamp\www\upload/newupload/" . $_FILES["file"]["name"]."</div>";
}
}
}
else
{
echo "<div class='error'>Invalid file</div>";
}
?>

Answer 3

Use this code according to your script


if($_FILES["image1"]["name"]!='')

         {

            $image_name1 = $_FILES["image1"]["name"];
            $source_image1=$_FILES["image1"]["tmp_name"];
        }

            $filename1= time()."_".$image_name1;
            $folderpath1 = ROOT."images/uploads/".$filename1;
                move_uploaded_file($source_image1,$folderpath1);
            if(!move_uploaded_file($source_image1,$folderpath1))
            {
                $err.="There is problem to upload the Image please try again";
            }

Answer 4

if(isset($_POST['submit'])){


    function PhotoUpload($imagename,$conn)
    {                    

        if(isset($imagename))
        {
            $filename = $_FILES[$imagename]['name'];
            $filesize = $_FILES[$imagename]['size'];
            $filetype = $_FILES[$imagename]['type'];
            $path = "photo/".$emp_id.".jpg";
            $allowedExtensions = array("tif","png","jpeg","jpg","gif"); 
            move_uploaded_file($_FILES[$imagename]["tmp_name"],"$path");

            $upd1="UPDATE `table` SET `photo`='$path'";
             $sql_upd = mysql_query($upd1);
             $msg='Record Updated Successfully';

        }
    }
    if($_FILES["file"]["error"] == 0)
    {
        PhotoUpload('file',$conn); 
    }

}

使用php上传图片时出错

4 个答案: