一、代碼
<?php $str = '應用crypt()函數進行單向加密!'; //聲明字串變數$str echo '加密前$str的值為：'.$str; $crypttostr = crypt($str); //對變數$str加密 echo '<p>加密後$str的值為：'.$crypttostr; //輸出加密後的變數 ?>
二、運行結果
參數不帶salt，每次加密得出的密文都不一樣。
加密前$str的值為：應用crypt()函數進行單向加密!
加密後$str的值為：$1$Re4.Gg4.$D.yd00xX0fFfIfp6KrKGN0
三、代碼
<!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函數進行資料驗證</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 $conn = mysql_connect("localhost","root","root") or die("資料庫連結錯誤".mysql_error()); mysql_select_db("db_database21",$conn) or die("資料庫訪問錯誤".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">使用者名稱：</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">密碼：</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'>使用者登入成功。</font>"; }else{ echo "<font color='green'>使用者登入失敗!</font>"; } }else{ echo "請認真填寫使用者名稱和密碼！"; } ?></td> <td> </td> </tr> <tr> <td height="200"> </td> <td> </td> <td> </td> </tr> </table> </body> </html>
四、運行結果
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