本文執行個體講述了PHP實現的登入頁面資訊提示功能。分享給大家供大家參考，具體如下：
login.php:
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title></head><body><form action="check_login.php" name="loginform" method="post">帳號： <input type="text" name="name" />密碼： <input type="password" name="pwd" /><input type="submit" value="登 錄" /></form><?phpecho "<br/>";//通過 error 值，確定提示資訊if(!empty($_GET['error'])){ $error=$_GET['error']; If($error==1){ Echo "<font color ='red'>您輸入的帳號或密碼錯誤！</font>"; }elseif ($error==2){ Echo "<font color ='red'>您輸入的帳號或密碼正確！</font>"; }}?></body></html>
check_login.php:
<?phpheader("Content-type: text/html; charset=utf-8");session_start(); //初始化session變數$username = $_POST['name']; //接收表單提交的使用者名稱$password=md5($_POST['pwd']); //接收表單提交的密碼class chkinput //定義類{ var $name; var $pwd; function chkinput($x,$y) //定義一個方法 { $this->name=$x; //將管理員名稱傳給類對象$this->name $this->pwd=$y; //將管理員密碼傳給類對象$this->pwd } function checkinput() { include("conn.php"); //串連資料庫檔案 $sql=mysql_query("select username,password from admin where username='".$this->name."' and password='".$this->pwd."'",$conn); $info=mysql_fetch_array($sql); //檢索管理員名稱和密碼是否正確 if($info==false) //如果管理員名稱或密碼不正確，則彈出相關提示資訊 { header("location:login.php?error=1"); exit; } else //如果管理員名稱或密碼正確，則直接跳轉到登陸成功後介面 { header("location:login.php?error=2"); $_SESSION['admin_name']=$info['username']; //將管理員名稱存到$_SESSION[admin_name]變數中 $_SESSION['pwd']=$info['password']; ////將管理員名稱存到$_SESSION[pwd]變數中 } }}$obj=new chkinput(trim($username),trim($password)); //建立對象$obj->checkinput(); //調用類?>
conn.php:
<?phpheader("Content-type: text/html; charset=utf-8");$conn = mysql_connect("localhost","root","111111");if(!$conn){ die("串連資料庫失敗".mysql_error());}mysql_select_db("design") or die("資料庫選擇失敗".mysql_error());mysql_query("set names 'uft8'");?>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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