PHP上传图片脚本无法正常工作

时间:2016-01-25 23:26:37

标签: php html webforms image-uploading

<?
if(isset($_POST['upload'])) {
    if(empty($_FILES['image'])) {
        echo "<p class=\"error\">Please upload an image...</p>\n";
    } else {
    $file_name= $_FILES['image']['name']; // original name
    $file_type = $_FILES['image']['type'];
    $file_size = $_FILES['image']['size'];
    $file_tmp = $_FILES['image']['tmp_name']; // temporary location on server
    $file_error = $_FILES['image']['error']; // reference to future error
    $file_ext = pathinfo($file_name, PATHINFO_EXTENSION);

    if($file_ext != "jpeg" || "jpg" || "gif" || "png") {
        echo "<p class=\"error\">Please upload an image that has the extension .jpg/jpeg, .gif, or .png.</p>\n";
    } else {
        if($file_size > (10000000)) {
            echo "<p class=\"error\">Please upload an image that does not exceed the file size of 10MB.</p>\n";
        } else {
            if($file_error) {
                echo "<p class=\"error\">Sorry, an unexpected error occurred: ".$file_error."</p>\n";
            } else {
                $f_rename = "pfp/".time().".png";
                move_uploaded_file($file_tmp,$f_rename);
                }
            }
       }
    }
}
?>
<!doctype html>
<html>
<head>
<title>Upload</title>
</head>
<body>
<form action="upload_test_image.php" method="POST" enctype="multipart/form-data">
    <input type="file" name="image" />
    <input type="submit" name="upload" value="Upload"/>
</form>
</body>
</html>

我无法上传任何图片,因为我无法通过文件扩展名检查。在我写这篇文章时,我也试图解决问题,如果它正是扩展验证的问题(可能是因为它只是打印出我发出的错误声明,因为它是第一个,如果...其他声明)。任何人都可以帮助在该代码或此代码中找到问题吗?

2 个答案:

答案 0 :(得分:0)

pathinfo()将需要文件的路径而不仅仅是文件名。 要获得扩展,您可以尝试这样做:

$extension = preg_replace('@.+\.@', '', $_FILES['image']['name'])

或者你可以查看$ _FILES ['image'] ['type'],因为它可能包含你正在寻找的类型。 finfo也可能有用: http://php.net/manual/en/function.finfo-file.php

答案 1 :(得分:0)

我认为你不能在PHP中做这样的布尔条件。

如何做,声明一组允许的扩展名:

$extensions = array("jpeg", "jpg", "gif","png");

然后检查文件扩展名是否在数组中:

if(!in_array($file_ext, $extensions)) {
    //Please upload an image that has the extension .jpg/jpeg, .gif, or .png.
}