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How does php crypt implement encryption of user registration passwords?

伊谢尔伦Original: 2017-07-08 10:36:281200browse

The example of this article shares the encryption of phpuser registration password for your reference. The specific content is as follows

1. Code

1、conn.php

<?php 
  $conn = mysql_connect("localhost", "root", "111") or die("连接数据库服务器失败！".mysql_error()); //连接MySQL服务器 
  mysql_select_db("db_database21",$conn);     //选择数据库db_database21 
  mysql_query("set names utf8");           //设置数据库编码格式utf8 
?>

2、index.php

<!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>用户注册</title> 
<style type="text/css"> 
<!-- 
body,td,th { 
  font-size: 12px; 
} 
--> 
</style></head> 
<body> 
<form id="form1" name="form1" method="post" action="index_ok.php"> 
 <fieldset style="width:500px"><legend style="font-size:16px">用户注册</legend><table width="300" border="0" align="center"> 
  <tr> 
   <td width="77" align="right">用户名：</td> 
   <td width="213"><input name="user" type="text" id="user" size="24" /></td> 
  </tr> 
  <tr> 
   <td align="right">密码：</td> 
   <td><input name="pwd" type="password" id="pwd" size="25" /></td> 
  </tr> 
  <tr> 
   <td> </td> 
   <td><input type="submit" name="sub" value="注册" /> 
     <input type="reset" name="res" value="重置" /></td> 
  </tr> 
 </table></fieldset> 
</form> 
</body> 
</html>

3、index_ok.php

<?php 
  header("content-type:text/html;charset=utf-8"); //加载头信息 
  include("conn/conn.php");//包含数据库连接文件 
  if(trim($_POST[&#39;user&#39;])!= "" and trim($_POST[&#39;pwd&#39;])!= ""){//判断输入是否为空 
    $pwd = crypt($_POST[&#39;pwd&#39;],"key");//对输入的密码进行crypt加密 
    $sql = "insert into tb_user(username,password)values(&#39;".$_POST[user]."&#39;,&#39;". $pwd."&#39;)";//定义sql语句 
    $result = mysql_query($sql,$conn);//执行sql语句 
    if($result){ 
      echo "<font color=&#39;red&#39;>注册成功。</font>";//如果结果为真提示注册成功 
    }else{ 
      echo "<font color=&#39;green&#39;>注册失败!</font>";//否则提示注册失败 
    } 
  }else{ 
    echo "请认真填写用户名和密码！";//提示输入用户名和密码 
  } 
?>

二、 Running results

After successful registration, the database displays as follows:

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