使用PHP脚本上传图像时出现严格标准错误 [英] Strict Standards Error while image upload with PHP script

问题描述

我尝试用php写一个图像上传器.但是当我尝试时，它给出了一个错误.

I try to write an image uploader with php. But it is giving an error when I try.

错误是:

Error is:

严格的标准:仅在第10行的C:\ xx \ xx \ xx \ profile_image_upload_script.php中通过引用传递变量

第10行是: $extension = end(explode(".", $file_name_encrypted));

图片上传脚本

<?php
$allowedExts = array("gif", "jpeg", "jpg", "png");

$file_name = $_FILES["file"]["name"];
echo "File name:".$file_name;

$file_name_encrypted = $file_name."".md5(rand(1, 1000000));


$extension = end(explode(".", $file_name_encrypted));
if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/jpg")
|| ($_FILES["file"]["type"] == "image/pjpeg")
|| ($_FILES["file"]["type"] == "image/x-png")
|| ($_FILES["file"]["type"] == "image/png"))
&& ($_FILES["file"]["size"] < 2097152) // 2 MB
&& in_array($extension, $allowedExts))
  {
  if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
    }
  else
    {
    echo "Upload: " . $file_name_encrypted . "<br>";
    echo "Type: " . $_FILES["file"]["type"] . "<br>";
    echo "Size: " . ($_FILES["file"]["size"] / 1024*1024) . " MB<br>";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br>";

    if (file_exists("upload/" . $file_name_encrypted))
      {
      echo $file_name_encrypted . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $file_name_encrypted);
      echo "Stored in: " . "upload/" . $file_name_encrypted;
      }
    }
  }
else
  {
  echo "Invalid file";
  echo "Return Code: " . $_FILES["file"]["error"] . "<br>";
  }
?>

注意:脚本正在从html表单获取文件名，没有问题

Note: script is getting file name from html form, there is no problem

推荐答案

注意$file_name_encrypted将不包含 real 或 matchable 扩展名，因为您的附加带有md5的文件名:

Note $file_name_encrypted will not contain a real or matchable extension, because your appending the filename with md5:

$file_name_encrypted = $file_name."".md5(rand(1, 1000000));

例如filename.jpg79054025255fb1a26e4bc422aef54eb4

因此它将永远不会与您的$allowedExts数组中的任何内容匹配.然后解决该问题:

So it will never match any in your $allowedExts array. Fix that then:

也更改该行:

$extension = pathinfo($file_name_encrypted, PATHINFO_EXTENSION);

或者爆炸，然后将爆炸传递给end()函数.

Or explode then pass the exploded to the end() function.

$temp = explode(".", $file_name_encrypted);
$extension = end($temp);

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