PHP開發登入頁面之HTML頁面
我們先看下圖
從上面的圖可以看到，我們的登入頁面運用了三個<input>標籤輸入網域，一個註冊連結<a>，一個立即登入按鈕<button>外加一個驗證碼，就構成了我們的登入頁面，但是如果需要我們的頁面更好看，css樣式是必不可少的，本章節的css樣式如下所示
<style type="text/css">
body{background-image: url("/images/1.jpg")}
.container{
width: 380px;
height: 330px;
margin: 0 auto;margin-top: 240px;
box-shadow: 0 0 20px #222;
border-radius:40px;
background-color: rgba(152, 242, 242, 0.23);
}
div.right{
position: relative;
left: 40px;
top: 20px;
}
input{
width: 180px;
height: 25px;
}
.button{
background-color: rgba(230, 228, 236, 0.93); /* Green */
border: none;
color: #110c0f;
padding: 10px 30px;
text-align: center;
display: inline-block;
font-size: 16px;
margin-top: -40px;
margin-left: 50px;
cursor: pointer;
}
</style>驗證碼
#本章節所運用的驗證碼程式碼如下所示
<?php
session_start();
Header("Content-type:image/PNG");
$im = imagecreate(60, 25);
$back = imagecolorallocate($im, 245, 245, 245);
imagefill($im, 0, 0, $back);
$vcodes = "";
for($i = 0; $i < 4; $i++){
$font = imagecolorallocate($im, rand(100, 255), rand(0, 100), rand(100, 255));
$authnum = rand(0, 9);
$vcodes .= $authnum;
imagestring($im, 5, 9 + $i * 10, 5, $authnum, $font);
}
$_SESSION['VCODE'] = $vcodes;
for($i=0;$i<200;$i++) {
$randcolor = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($im, rand()%60, rand()%25, $randcolor); //
}
imagepng($im);
imagedestroy($im);
?>我們需要在我們登入之前在我們的HTML頁面做一個判斷，如果我們的用戶名，密碼，驗證碼不輸入就登錄的話，我們要提示用戶用戶輸入相關的資訊才能登錄，這樣我們就可以用我們的JS（JavaScript）判斷了，
#JS程式碼如下##
<script type="text/javascript">
function foo(){
if(myform.name.value=="")
{
alert("请输入用户名");
myform.name.focus();
return false;
}
if (myform.pwd.value=="")
{
alert("请输入密码");
myform.pwd.focus();
return false;
}
if (myform.yzm.value=="")
{
alert("请输入验证码");
myform.yzm.focus();
return false;
}
}
</script>完整的HTML頁面程式碼
#login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆界面</title>
<script type="text/javascript">
function foo(){
if(myform.name.value=="")
{
alert("请输入用户名");
myform.name.focus();
return false;
}
if (myform.pwd.value=="")
{
alert("请输入密码");
myform.pwd.focus();
return false;
}
if (myform.yzm.value=="")
{
alert("请输入验证码");
myform.yzm.focus();
return false;
}
}
</script>
<style type="text/css">
body{background-image: url("/images/1.jpg")}
.container{
width: 380px;
height: 330px;
margin: 0 auto;margin-top: 240px;
box-shadow: 0 0 20px #222;
border-radius:40px;
background-color: rgba(152, 242, 242, 0.23);
}
div.right{
position: relative;
left: 40px;
top: 20px;
}
input{
width: 180px;
height: 25px;
}
.button{
background-color: rgba(230, 228, 236, 0.93); /* Green */
border: none;
color: #110c0f;
padding: 10px 30px;
text-align: center;
display: inline-block;
font-size: 16px;
margin-top: -40px;
margin-left: 50px;
cursor: pointer;
}
</style>
</head>
<body>
<form action="login.php" method="post" onsubmit="return foo();" name="myform" >
<div class="container"style="font-size:17px">
<div class="right">
<h2>用户登陆</h2>
<p>
用户名:<input type="text" name="name" id="name" placeholder="请输入用户名">
</p>
<p>
密　码:<input type="password" id="pwd" placeholder="请输入密码" >
</p>
<p>
验证码:<input type="text" name="yzm" id="yzm" id="yzm" placeholder="请输入验证码">
<img src="yanzhengma.php" onClick="this.src='yanzhengma.php?nocache='+Math.random()" style="cursor:hand">
</p>
<p style=" margin-left: 200px"><a href="zhuce.html">注册</a></p>
<p>
<button class="button">立即登陆</button>
</p>
</div>
</div>
</form>
</body>
</html>運行程式嘗試一下這樣我們的HTML頁面就做出來了，下一步就要提交到我們的login.php 頁面進行下一步處理了
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆界面</title>
<script type="text/javascript">
function foo(){
if(myform.name.value=="")
{
alert("请输入用户名");
myform.name.focus();
return false;
}
if (myform.pwd.value=="")
{
alert("请输入密码");
myform.pwd.focus();
return false;
}
if (myform.yzm.value=="")
{
alert("请输入验证码");
myform.yzm.focus();
return false;
}
}
</script>
<style type="text/css">
body{background-image: url("https://img.php.cn/upload/course/000/000/006/5811779a6dae7451.jpg")}
.container{
width: 380px;
height: 330px;
margin: 0 auto;margin-top: 240px;
box-shadow: 0 0 20px #222;
border-radius:40px;
background-color: rgba(152, 242, 242, 0.23);
}
div.right{
position: relative;
left: 40px;
top: 20px;
}
input{
width: 180px;
height: 25px;
}
.button{
background-color: rgba(230, 228, 236, 0.93); /* Green */
border: none;
color: #110c0f;
padding: 10px 30px;
text-align: center;
display: inline-block;
font-size: 16px;
margin-top: -40px;
margin-left: 50px;
cursor: pointer;
}
</style>
</head>
<body>
<form action="" method="post" onsubmit="return foo();" name="myform" >
<div class="container"style="font-size:17px">
<div class="right">
<h2>用户登陆</h2>
<p>
用户名:<input type="text" name="name" id="name" placeholder="请输入用户名">
</p>
<p>
密　码:<input type="password" name="pwd" id="pwd" placeholder="请输入密码" >
</p>
<p>
验证码:<input type="text" name="yzm" id="yzm" placeholder="请输入验证码">
<img src="yanzhengma.php" onClick="this.src='yanzhengma.php?nocache='+Math.random()" style="cursor:hand">
</p>
<p style=" margin-left: 200px"><a href="zhuce.html">注册</a></p>
<p>
<button class="button">立即登陆</button>
</p>
</div>
</div>
</form>
</body>
</html>
