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PHP method to accept files and get suffix name

墨辰丷

Jun 07, 2018 pm 05:29 PM

php

This article mainly introduces the method of using PHP to accept files and obtain their suffix names. The author focuses on the use of the $_FILES global variable. Friends in need can refer to

HTML form form
Use an HTML form to simulate a post request for file upload. The code is as follows:

  <!DOCTYPE html> 
  <html> 
  <head> 
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
  <title>File Upload</title> 
  </head> 
  <body> 
   
  <form enctype="multipart/form-data" action="test.php" method="POST"> 
    <input type="hidden" name="MAX_FILE_SIZE" value="30000" /> 
    Send this File:<input name="userfile" type="file"/> 
    <input type="submit" value="Send File" /> 
  </form> 
   
   
  </body> 
  </html>

Note:

Make sure that the attribute of the file upload form is enctype="multipart/form- data", otherwise the file cannot be uploaded

PHP
First of all, you need to explain PHP’s global variable $_FILES. This array contains all uploaded file information

$_FILE['userfile']['name'] : The original name of the client machine file
$_FILE['userfile']['type'] : The file's original name MIME type
$_FILE['userfile']['size'] : Uploaded file size
$_FILE['userfile' ]['tmpname'] : The temporary file name stored on the server after the file is uploaded
$_FILE['userfile']['error'] : and the error code for uploading the file

Ideas
1. Generate a 40-digit random string as the file name
2. Transfer the file to different file locations depending on whether it is a picture or a voice
3. No verification of file size and file type is required for the time being.

  function processFile($files, $type) { 
    $uploadName = null; 
    foreach ($files as $name => $value) { 
      $originalName = $value[&#39;name&#39;]; 
      $arr = explode(".", $originalName); 
      $postfix = $arr[count($arr) - 1]; 
      $tmpPath = $value[&#39;tmp_name&#39;]; 
      $tmpType = $value[&#39;type&#39;]; 
      $tmpSize = $value[&#39;size&#39;]; 
    } 
     
    $newname = EhlStaticFunction::generateRandomStr(40).".".$postfix; 
     
    switch ($type) { 
      case 1 :  
        // 处理声音文件 
        $destination = VIDEOUPLOADDIR.$newname; 
        break; 
      case 2 : 
        // 处理图像文件 
        $destination = IMAGEUPLOADDIR.$newname; 
        break; 
    } 
     
    move_uploaded_file($tmpPath, $destination); 
  }

To obtain the suffix name of the uploaded file, you can use the following code:

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title></title>
  <meta name="keywords" content=" keywords" />
  <meta name="description" content="description" />
</head>
<body>
  <form method="post" action="" enctype="multipart/form-data">
  <input type="file" name="upfile" size="20" />
  <input type="submit" name="submit" value="submit" />
  </form>
</body>
</html>

PHP

<?PHP
  if(isset($_POST[&#39;submit&#39;])) {
    $string = strrev($_FILES[&#39;upfile&#39;][&#39;name&#39;]);
    $array = explode(&#39;.&#39;,$string);
    echo $array[0];
  }  
?>

Result example:

20158591330708.jpg (423×167)

Summary: The above is the entire content of this article, I hope it can be helpful to everyone learning helps.

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