Contoh Login Form PHP
<html>
<head>
<link rel="stylesheet" type="text/css" href="style/style.css" />
<title>
RegiSys
</title>
<script type="text/javascript" src="js/js.js"></script>
</head>
<div style="margin-top:70px; text-align:center; color:#128680; ">
<div style="font-size:40px">
Welcome to <b>U S App</b>
</div>
<p>
<i>Dealer and Service maintenance application</i>
</p>
</div>
<body>
<div id="loginbox">
<?
include "koneksi.php";
//if the username and password box is empty do :
if(!empty($_POST['username']) && !empty($_POST['password'])){
$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string(md5($_POST['password']));
//selecting data and checking its existance inside tables
$checkusercommon=mysql_query("select * from user where username ='".$username."' and password = '".$password."'");
$checkuseradmin = mysql_query("select * from useradmin where username = '".$username."' and password = '".$password."'");
$checkusersa = mysql_query("select * from usersa where username = '".$username."' and password = '".$password."'");
$_SESSION['username']= $username;
//checking users and then pass them to specific page
if(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) == 0){
//if the user doesnt exist in all tables dont allow him in
?>
<script>
alert ("Username not found");
window.location="index.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) != 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) == 0){
//if the user exist inside user table let him in to member page
?>
<script>
window.location="homepage.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) != 0 && mysql_num_rows($checkusersa) == 0){
//if the user exist inside admin table let him in to admin page
?>
<script>
window.location="adminhomepage.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) != 0){
//if the user exist inside usersa table let him in to sa homepage
?>
<script>
window.location="sahonepage.php";
</script>
<?
}else{
?>
<script>
alert ("Internal error, please try again");
window.location="index.php";
</script>
<?
}
}else{
?>
<form name=myloginfrm action=index.php method=POST onsubmit="checkthisform()">
<table>
<tr>
<th>Username</th><td>:<input class="inputsmall" type=text name="username" /></td>
</tr>
<tr>
<th>Password</th><td>:<input class="inputsmall" type="password" name="password" /></td>
</tr>
<tr>
<th colspan=2><div style="text-align:right"><input class="loginsubmit" type=submit name=submit id=submit value="Login"/></div></th><td></td>
</tr>
</table>
</form>
<?
}
?>
</div>
</body>
</html>
<head>
<link rel="stylesheet" type="text/css" href="style/style.css" />
<title>
RegiSys
</title>
<script type="text/javascript" src="js/js.js"></script>
</head>
<div style="margin-top:70px; text-align:center; color:#128680; ">
<div style="font-size:40px">
Welcome to <b>U S App</b>
</div>
<p>
<i>Dealer and Service maintenance application</i>
</p>
</div>
<body>
<div id="loginbox">
<?
include "koneksi.php";
//if the username and password box is empty do :
if(!empty($_POST['username']) && !empty($_POST['password'])){
$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string(md5($_POST['password']));
//selecting data and checking its existance inside tables
$checkusercommon=mysql_query("select * from user where username ='".$username."' and password = '".$password."'");
$checkuseradmin = mysql_query("select * from useradmin where username = '".$username."' and password = '".$password."'");
$checkusersa = mysql_query("select * from usersa where username = '".$username."' and password = '".$password."'");
$_SESSION['username']= $username;
//checking users and then pass them to specific page
if(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) == 0){
//if the user doesnt exist in all tables dont allow him in
?>
<script>
alert ("Username not found");
window.location="index.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) != 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) == 0){
//if the user exist inside user table let him in to member page
?>
<script>
window.location="homepage.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) != 0 && mysql_num_rows($checkusersa) == 0){
//if the user exist inside admin table let him in to admin page
?>
<script>
window.location="adminhomepage.php";
</script>
<?
}elseif(mysql_num_rows($checkusercommon) == 0 && mysql_num_rows($checkuseradmin) == 0 && mysql_num_rows($checkusersa) != 0){
//if the user exist inside usersa table let him in to sa homepage
?>
<script>
window.location="sahonepage.php";
</script>
<?
}else{
?>
<script>
alert ("Internal error, please try again");
window.location="index.php";
</script>
<?
}
}else{
?>
<form name=myloginfrm action=index.php method=POST onsubmit="checkthisform()">
<table>
<tr>
<th>Username</th><td>:<input class="inputsmall" type=text name="username" /></td>
</tr>
<tr>
<th>Password</th><td>:<input class="inputsmall" type="password" name="password" /></td>
</tr>
<tr>
<th colspan=2><div style="text-align:right"><input class="loginsubmit" type=submit name=submit id=submit value="Login"/></div></th><td></td>
</tr>
</table>
</form>
<?
}
?>
</div>
</body>
</html>
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