Question

我有一个上传图片的脚本..它运行正常，并为图像命名为image1.png。

我现在面临的问题是我只能上传png图像，我需要能够上传各种图像。我知道我必须得到分机。但是我无法让它发挥作用。

这是脚本

<?php $target_dir = "images2/"; 
$target_file = $target_dir . ("image1.png");
$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"] > 500000) {
echo "Sorry, your file is too large.";
$uploadOk = 0;
}
// Allow certain file formats
if($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.";}}
    ?>

Answer 1

可能最好测试图像扩展是否在数组中。代码更短，问题更少：

$imgExt = array('jpg','png','jpeg','gif');
if(!in_array($imageFileType, $imgExt)) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}

PHP in_aray()

Answer 2

从上传脚本中删除以下代码

// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
$uploadOk = 0;
}

并设置$uploadOk=1;或不需要设置它。

可能会帮助你。

Answer 3

因为如果条件你只能使用以下条件

 if($imageFileType != "png"  ) {
     echo "</br>Sorry, only  PNG files are allowed.";
     $uploadOk = 0; }

Answer 4

更新此行： if($imageFileType == "jpg" || $imageFileType == "png" || $imageFileType == "jpeg" || $imageFileType == "gif" ) {

删除$uploadOk

Answer 5

您可以使用上传文件的扩展名作为目标文件：

$ target_file变量不包含扩展名：

$target_file = $target_dir . ("image1.");

最后添加：

if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file.$imageFileType)) {

php图片上传扩展

5 个答案: