时间:2021-07-01 10:21:17 帮助过:47人阅读
一、代码
输出加密后的变量 ?>
- <?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:'.$crypttostr; //
二、运行结果
参数不带salt,每次加密得出的密文都不一样。
加密前$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>
- <p 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");
- ?>
- </p>
- <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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