我在上传图片时遇到问题。 我正在使用W3Schools的表单和脚本。 代码如下。问题是文件类型的验证。getimagesize 返回它是实际图像，但它无法通过文件类型的验证。我收到以下错误：文件是图像 - 图像/jpeg。抱歉，只允许 JPG、JPEG、PNG 和 GIF 文件。抱歉，您的文件未上传。
当我评论进行验证的 if 函数时，图像上传得很好。
/*if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}*/
我在论坛上查过，但没有人遇到过这种类型的错误。提前谢谢你。
基本形式：
<form action="includes/upload.php" method="post" enctype="multipart/form-data">
Select image to upload:
<input type="file" name="fileToUpload" id="fileToUpload">
<input type="submit" value="Upload Image" name="submit">
</form>
上传.php脚本：
<?php
$target_dir = "../uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
$check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
if($check !== false) {
echo "File is an image - " . $check["mime"] . ".";
$uploadOk = 1;
} else {
echo "File is not an image.";
$uploadOk = 0;
}
}
// Check if file already exists
if (file_exists($target_file)) {
echo "Sorry, file already exists.";
$uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 50000000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}
// Allow certain file formats
// This is where the problem occurs
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
} else {
echo "Sorry, there was an error uploading your file.";
}
}
?>
使用
$_FILES["fileToUpload"]["name"] 而不是使用 $target_file
$imageFileType = pathinfo($_FILES["fileToUpload"]["name"],PATHINFO_EXTENSION);