本文实例讲述了php对文件进行hash运算的方法。分享给大家供大家参考。具体如下:

这段代码非常有用,如果你下载了一个文件,网站提供了hash结果,你可以对你下载下来的文件进行hash运算,以验证下载的文件是否正确。

<html>
<head>
  <title>Hash (Check) Files</title>
  <style type='text/css'>
   #ok{color:green;}
   #nono{color:red;}
  </style>
</head>
<body>
 <"file"]["error"] > 0){
    switch($_FILES["file"]["error"]){
     case 1:
     echo "<b id='nono'>Error: The uploaded file exceeds the upload_max_filesize directive in php.ini</b><br>";
     break;
     case 2:
     echo "<b id='nono'>Error: The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.</b><br>";
     break;
     case 3:
     echo "<b id='nono'>Error: The uploaded file was only partially uploaded.</b><br>";
     break;
     case 4:
     echo "<b id='nono'>Error: No file was uploaded.</b><br>";
     break;
     case 6:
     echo "<b id='nono'>Error: Missing a temporary folder.</b><br>";
     break;
     case 7:
     echo "<b id='nono'>Error: Failed to write file to disk.</b><br>";
     break;
     case 8:
     echo "<b id='nono'>Error: A PHP extension stopped the file upload.</b><br>";
     break;
     default:
     echo "<b id='nono'>Unknown error occured.</b><br>";
    }
   } else {
    echo 'Upload: ' . $_FILES['file']['name'] . '<br>';
    echo 'Type: ' . $_FILES['file']['type'] . '<br>';
    echo 'Size: ' . (round($_FILES['file']['size'] / 1024, 2)) . ' Kb<br><br>';
    if(array_search($_POST['algo'], hash_algos())===false){
    echo 'Unknown hashing algorithm requested.<br>';
    } else {
    echo 'Hashing Algorithm: '. $_POST['algo'] . '<br>';
    $hash = hash_file($_POST['algo'], $_FILES['file']['tmp_name']);
    echo 'Calculated hash: ' . $hash . '<br>';
    if($_POST['exphash']!=='none' && !empty($_POST['exphash'])){
      echo 'Expected hash: &nbsp;&nbsp;' . $_POST['exphash'] . '<br><br>';
      echo ($hash==$_POST['exphash'])"ok">Hash matched expected value.</b>' : '<b id="nono">Hash did not match expected value.</b>';
      echo '<br>';
    }
    }
   }
   "document.location.reload(true)">Again</button>
    <"" method="post" enctype="multipart/form-data">
   <input type="hidden" name="exphash" value="none">
   <label for="file">Filename:</label>
   <input type="file" name="file" id="file">
   <input type="submit" name="submit" value="Submit" /><br>
   <label>Expected hash(optional): <input type="text" name="exphash" size="100"></label>
   <br><br>Choose an algorithm (This is the list of all the available algorithms in your php installation)<br>
   <"<label><input type='radio' name='algo' value='$algo' checked='checked'>$algo</label><br>";
    } else {
    echo "<label><input type='radio' name='algo' value='$algo'>$algo</label><br>";
    }
   }
   ?>
  </form>
 <?php
   }
  ?>
</body>
</html>

希望本文所述对大家的php程序设计有所帮助。

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稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!

昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。

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而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?