php使用crypt()函数进行加密
author:一佰互联 2019-04-26   click:139

一、代码

<?php  $str = "应用crypt()函数进行单向加密!";     //声明字符串变量$str  echo "加密前$str的值为:".$str;  $crypttostr = crypt($str);      //对变量$str加密  echo "<p>加密后$str的值为:".$crypttostr;  //输出加密后的变量 ?> 

二、运行结果

参数不带salt,每次加密得出的密文都不一样。加密前$str的值为:应用crypt()函数进行单向加密!加密后$str的值为:$1$Re4.Gg4.$D.yd00xX0fFfIfp6KrKGN0

三、代码

<!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=gb2312" /> <title>使用crypt函数进行数据验证</title> <style type="text/css"> <!-- body,td,th {  font-size: 12px; } body {  margin-left: 10px;  margin-top: 10px;  margin-right: 10px;  margin-bottom: 10px; } .STYLE1 {  font-size: 14px;  font-weight: bold; } --> </style> </head> <body> <div align="center"> <?php  $conn = mysql_connect("localhost","root","root") or die("数据库链接错误".mysql_error());  mysql_select_db("db_database21",$conn) or die("数据库访问错误".mysql_error());  mysql_query("set names gb2312"); ?> </div> <table width="777" height="587" border="0" align="center" cellpadding="0" cellspacing="0" background="images/bg.jpg">  <tr>  <td width="149" height="200"> </td>  <td width="448"> </td>  <td width="158"> </td>  </tr>  <tr>  <td height="187"> </td>  <td align="center" valign="middle"> <form id="form1" name="form1" method="post" action="index.php">  <table height="129" border="0" cellpadding="0" cellspacing="0">   <tr>    <td width="100" height="30" align="right" valign="middle" scope="col"><span class="STYLE1">用户名:</span></td>   <td width="100" height="30" align="left" valign="middle" scope="col"><label for="textfield"></label>   <input name="username" type="text" id="username" size="24" /></td>   <td width="100" align="center" valign="middle" scope="col"> </td>   </tr>   <tr>   <td height="30" align="right" valign="middle" class="STYLE1" scope="col">密码:</td>   <td height="30" align="left" valign="middle" scope="col"><input name="password" type="password" id="password" size="25" /></td>   <td align="center" valign="middle" scope="col"> </td>   </tr>   <tr>   <td height="40" colspan="3" align="center" valign="middle" scope="col"><input type="image" name="imageField" src="images/bg2.JPG" />        <input type="image" name="imageField2" src="images/bg1.JPG" onclick="form.reset();return false;" /></td>   </tr>  </table>  </form>  <?php  if(trim($_POST[username])!= "" and trim($_POST[password])!= ""){   $usr = crypt(trim($_POST[username]),$_POST[username]);   $pwd = crypt(trim($_POST[password]),$_POST[password]);   $sql = "select * from tb_user where username = "".$usr."" and password="".$pwd.""";   $rst = mysql_query($sql,$conn);   $result=mysql_num_rows($rst);   if($result>0){    echo "<font color="red">用户登录成功。</font>";   }else{    echo "<font color="green">用户登录失败!</font>";   }  }else{   echo "请认真填写用户名和密码!";  } ?></td>  <td> </td>  </tr>  <tr>  <td height="200"> </td>  <td> </td>  <td> </td>  </tr> </table> </body> </html> 

四、运行结果

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