Question

我试图上传图片文件，我想显示该图片的信息。但我的代码不起作用，我不确定是什么问题，我希望有人可以指出我做错了什么。

<!DOCTYPE html>
<html>
<head>
<title>Upload Image</title>
</head>
<body>
<form action="upload_image.php" action="post" enctype="multipart/form-data">
Select image: <input type="file" name="image">
<input type="submit" name="upload" value="Upload Now">
</form>
<?php
if(isset($_POST['upload'])){

   echo $image_name = $_FILES['image']['name'];
   echo $image_type = $_FILES['image']['type'];
   echo $image_size = $_FILES['image']['size'];
   echo $image_tmp_name = $_FILES['image']['tmp_name'];

   if($image_name == ""){
        echo "<script>alert('Please select an image!')</script>";
        exit();
   }
}
?>
</body>
</html>

ps：我还是php和文件上传的新手，所以请放轻松我...提前谢谢你

Answer 1

问题似乎在于您没有指定上传位置的任何位置，也没有指定文件类型。这是带有扩展验证，大小和将文件移动到名为images的文件夹中的代码。

<?php
if(isset($_FILES['image'])){
    $errors= array();
    $file_name = $_FILES['image']['name'];
    $file_size =$_FILES['image']['size'];
    $file_tmp =$_FILES['image']['tmp_name'];
    $file_type=$_FILES['image']['type'];   
    $file_ext=strtolower(end(explode('.',$_FILES['image']['name'])));
    $extensions = array("jpeg","jpg","png");        
    if(in_array($file_ext,$extensions )=== false){
     $errors[]="extension not allowed, please choose a JPEG or PNG file."
    }
    if($file_size > 2097152){
    $errors[]='File size must be excately 2 MB';
    }               
    if(empty($errors)==true){
        move_uploaded_file($file_tmp,"images/".$file_name);
        echo "Success";
    }else{
        print_r($errors);
    }
}
?>
<form action="" method="POST" enctype="multipart/form-data">
    <input type="file" name="image" />
    <input type="submit"/>
</form>

上传图片并显示信息

1 个答案: