我正在创建我的网站的Android应用程序。我想知道在我的php文件中需要进行哪些更改才能将我的Android应用程序连接到我的网站数据库，因为这些文件没有echo语句或我必须为这些目的制作另一个php文件。请帮忙，因为我是android的新手。我的第一个文件是login.php
<?php require_once('Connection/cnn.php'); ?>
<?php
session_start();
if((isset($_POST['admin_login'])) && ($_POST['admin_login']=="form99"))
{
$_SESSION['username']=$_POST['txt_email'];
$_SESSION['password']=$_POST['txt_password'];
header('Location: login-pass.php');
}
if($_SESSION['verified']=='Y')
{
header('Location: transporter-account.php');
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Transporteazy</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="js/main.js"></script>
</head>
<body>
<!-- MAIN BODY WRAPPER START -->
<div id="main-Body-Wrapper">
<!-- HEADER PART START -->
<div id="header-con">
<?php include ('header.php'); ?>
</div>
<!-- HEADER PART END -->
<!-- MIDDLE PART START -->
<div class="how-it-work">
<div class="left-part">
<?php if($_GET['msg']=='error') {?>
<h1>Please login below to see posted loads or <a href="transporter-registration.php" target="_self">click here</a> to register with us.</h1>
<?php } else {?>
<h1>Login Area</h1>
<?php } ?>
<div class="login">
<?php $page=$_SERVER['QUERY_STRING'];
if ($page!="") { ?>
<div class="error">
<?php if ($_GET['error']=="empty") { ?>
<p class="alert">Please enter user name & password.</p>
<?php } else if ($_GET['error']=="name") {?>
<p class="alert">Please enter user name.</p>
<?php } else if ($_GET['error']=="pass") {?>
<p class="alert">Please enter password.</p>
<?php } else if ($_GET['error']=="nouser") {?>
<p class="alert">Something is wrong.</p>
<?php } else if ($_GET['error']=="pend") {?>
<p class="alert">You are not a authorize person to access further pages.</p>
<?php }?>
</div>
<?php }?>
<h3>If you are already registered, please login here.</h3>
<div class="loginBox">
<form name="login-form" id="login-form" method="post">
<table width="420" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="150" align="right" valign="middle">Email Address :</td>
<td align="left" valign="top"><input name="txt_email" type="email" class="input" id="txt_email" value="" required placeholder="abc@xyz.com"/></td>
</tr>
<tr>
<td align="right" valign="middle">Password:</td>
<td align="left" valign="top"><input name="txt_password" type="password" class="input" id="txt_password" value="" required placeholder="*********"/></td>
</tr>
<tr>
<td align="right" valign="middle"> </td>
<td align="left" valign="top"><input name="Submit" type="submit" class="loginBtn" value="" />
<input type="hidden" name="admin_login" value="form99"/></td>
</tr>
<tr>
<td align="right" valign="top"> </td>
<td align="left" valign="top"> </td>
</tr>
<tr>
<td align="right" valign="top"> </td>
<td align="left" valign="top"><a href="forgot-password.php" target="_self">Forgot Password?</a> <font color="#FF0000">|</font> <a href="transporter-registration.php" target="_self">Register here</a></td>
</tr>
</table>
</form>
</div>
</div>
</div>
<!-- RIGHT PART -->
<div class="right-part">
<?php include('benefits.php');?>
</div>
<!-- RIGHT PART -->
</div>
<!-- MIDDLE PART END -->
<!-- FOOTER PART STRAT -->
<div class="footerCon">
<?php include ('footer.php'); ?>
</div>
<!-- FOOTER PART END -->
</div>
<!-- MAIN BODY WRAPPER END -->
</body>
</html>