Question

我正在将图片上传到文件夹，应用程序正常工作，但是第一次打开页面上传图片时我的错误信息很少，当我上传图片时没有错误信息结束我可以上传尽可能多的我想要没有错误。当我再次点击或重新加载页面时，第一次出现错误，并在首次上传错误后消失。

我有文件夹图片

File: pictureupload.php
File: classimage.php

pictureupload.php的代码是

<?php
include_once 'classimage.php';
$img= new images();

$img->uploadImages();

?>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>

<body>
<form action="index.php" method="post" enctype="multipart/form-data">
<input type="file" name="picture" >
<br><br>

<input type="submit" name="upload" value="Upload Picture">
</form>
</body>

</html>

classimage.php的代码是

<?php
class images
{
protected $fileName;
protected $fileTmp;
protected $fileType;
protected $fileSize;
protected $fileError;

public function __construct()
{
$this->fileName = $_FILES['picture']['name'];
$this->fileTmp = $_FILES['picture']['tmp_name'];
$this->fileSize = $_FILES['picture']['size'];
$this->fileError = $_FILES['picture']['error'];
$this->fileType =$_FILES['picture']['type'];
}

public function uploadImages()
{
//if Button push
if(isset($_POST['upload']) && $_POST['upload']=='Upload Picture')
{
//get type after .
$kabom = explode(".", $this->fileName);
//get image type
$fileExtnsion = end($kabom);
$fileName = time().rand().".".$fileExtnsion;

if(!$this->fileTmp)
{
echo "Error: Please browse for a file before clicking the upload button";
exit();
}
elseif ($this->fileSize > 5242880)
{
echo "Error: Your file was large than 5MB";
unlink($this->fileTmp);
exit();
}
elseif (!preg_match("/.(gif|jpg|png)$/i", $this->fileName))
{
echo "ERROR: Your image was not .gif, .jpg, or .png.";
unlink($this->fileTmp);
exit();
}


elseif ($this->fileError==1)
{
echo "Error.Please try again";
exit();
}
$movePicture = move_uploaded_file($this->fileTmp, "images/$fileName");
if($movePicture == false)
{
echo "Error File not uploaded.";
exit();
}
}
}
}
?>

我上传图片的第一次出现此错误

Notice: Undefined index: picture in C:\xampp\htdocs\www\imageupload\test\classimage.ph p on line 12

Notice: Undefined index: picture in C:\xampp\htdocs\www\imageupload\test\classimage.ph p on line 13

Notice: Undefined index: picture in C:\xampp\htdocs\www\imageupload\test\classimage.ph p on line 14

Notice: Undefined index: picture in C:\xampp\htdocs\www\imageupload\test\classimage.ph p on line 15

Notice: Undefined index: picture in C:\xampp\htdocs\www\imageupload\test\classimage.ph p on line 16

此错误来自文件classimage.php

$this->fileName = $_FILES['picture']['name']; - line12
$this->fileTmp = $_FILES['picture']['tmp_name']; - line 13
$this->fileSize = $_FILES['picture']['size']; - line 14
$this->fileError = $_FILES['picture']['error']; - line 15
$this->fileType =$_FILES['picture']['type']; - line 16

Answer 1

第一次加载页面时不会设置好$_FILES['picture']，因为您没有上传任何图片，因此当您执行时：

$img= new images();

在构造函数中，您想要从$ _FILES [＆＃39; picture＆＃39;]获取日期，但尚未设置。

在做其他任何事情之前，你应该先检查$ _FILES数组。

public function __construct()
  if (count($_FILES) > 0) {
    // constructor code.
  }
}

OOP上传文件夹中的图像

1 个答案: