Question

得到我确信这是一个简单的问题，但似乎找不到一个有效的简单解决方案。我正在创建一个图片上传网站，我只想让JPEG和PNG成为允许的文件类型。这是我的PHP代码的开始，当用户在选择文件后点击“上传”按钮时运行。在此之后，我只有一长串的IF语句，这些语句都运行和运行。

非常感谢任何帮助。

if（$ _FILES ['filename'] ['name'] ['size']）{

    session_start(); 
    $name = $_FILES['filename']['name'];
    $size = $_FILES['filename']['size'];
    $tmp_name = $_FILES['filename']['tmp_name'];

    if($size < 2000000) {...

Answer 1

我认为这样做

    $allowed_types =array('jpg','png')
    $userFile = $_FILES['filename']['name'];
    $error = null;

    // Get the file extension
    $extension = pathinfo($userFile, PATHINFO_EXTENSION);

    // Search the array for the allowed file type

    if (in_array($extension, $allowed_types, false) != true) {

        $error = "ERROR: ILLEGAL FILE TYPE";
        return $error; // or use  exit;
    }

Answer 2

检查上传文件的type属性。示例代码来自： http://www.php.net/manual/en/features.file-upload.php

/*** 
    now verify the mime, i did not find 
    something more easy than verify the 
    'image/' ty^pe. if wrong tell it! 
***/ 

    if(!eregi('image/', $_FILES['attachement']['type'])) { 

      echo 'The uploaded file is not an image please upload a valide file!'; 

    } else {

Answer 3

我试过了..它帮助了我......

这也可以帮到你..

<?php
$target_dir = "images/";
$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"] > 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, PNG, JPEG and 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.";
    }
}
?>

仅在PHP文件上载期间接受某些文件类型

3 个答案: