php 一个完整的表单验证实例

HTML代码：

<html> 
<head> 
<title>Form</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<script language="javascript" src="form.js" src="form.js"></script> 
</head> 

<body> 
<form action="post.php" method="get" name="form1" onsubmit="return form_sub()"> 
<table width="271" border="0" align="center" cellpadding="0" cellspacing="0"> 
<tr> 
<td width="85"><div align="right">姓名：</div></td> 
<td width="186"><input name="username" type="text" id="username"></td> 
</tr> 
<tr> 
<td><div align="right">密码：</div></td> 
<td><input name="password" type="password" id="password"></td> 
</tr> 
<tr> 
<td><div align="right">密码确认：</div></td> 
<td><input name="password2" type="password" id="password2"></td> 
</tr> 
<tr> 
<td><div align="right">性别：</div></td> 
<td><select name="sex" id="sex"> 
<option value="0" selected>男</option> 
<option value="1">女</option> 
</select></td> 
</tr> 
<tr> 
<td><div align="right">生日：</div></td> 
<td><input name="birthday" type="text" id="birthday"></td> 
</tr> 
<tr> 
<td><div align="right">E-mail：</div></td> 
<td><input name="email" type="text" id="email"></td> 
</tr> 
<tr> 
<td><div align="right">职业：</div></td> 
<td><input name="job" type="text" id="job"></td> 
</tr> 
</table> 
<p align="center"> 
<input type="submit" value="Submit"> 
<input type="reset" value="Reset"> 
</p> 
</form> 
</body> 
</html>

js代码：

function form_sub() 
{ 
if(!test_username(document.form1.username.value)) 
{ 
alert("姓名格式不正确"); 
return false; 
} 

if(!test_date(document.form1.birthday.value)) 
{ 
alert("日期格式不正确"); 
return false; 
} 

if(!test_email(document.form1.email.value)) 
{ 
alert("E-mail地址格式不正确"); 
return false; 
} 

if(!test_password(document.form1.password.value, document.form1.password2.value)) 
{ 
alert("两次密码输入不相同"); 
return false; 
} 
} 

function test_username(str_username) 
{ 
var pattern = /[a-zA-Z_]/; 
if(pattern.test(str_username)) 
return true; 
else 
return false; 
} 

function test_date(str_birthday) 
{ 
var pattern = /[0-9]{4}-[0-9]{2}-[0-9]{2}/; 
if(pattern.test(str_birthday)) 
return true; 
else 
return false; 
} 

function test_email(str_email) 
{ 
var pattern = /^[a-zA-Z0-9_.]+@([a-zA-Z0-9_]+.)+[a-zA-Z]{2,3}$/; 
if(pattern.test(str_email)) 
return true; 
else 
return false; 
} 

function test_password(str_p1, str_p2) 
{ 
if(str_p1==str_p2) 
return true; 
else 
return false; 
}

php代码：

<?php 
//本程序用于接收来自HTML页面的表单数据并进行相应的验证 
$founderr = false; //初始化founderr变量，表示没有错误 
if(!ereg("[a-zA-Z_]", $_GET['username'])) 
{ 
echo "姓名格式不正确<BR>"; 
$founderr = true; 
} 

if(!ereg("[0-9]{4}-[0-9]{2}-[0-9]{2}", $_GET['birthday'])) 
{ 
echo "日期格式不正确<BR>"; 
$founderr = true; 
} 

if(!ereg("^[a-zA-Z0-9_.]+@([a-zA-Z0-9_]+.)+[a-zA-Z]{2,3}$", $_GET['email'])) 
{ 
echo "E-mail地址格式不正确<BR>"; 
$founderr = true; 
} 

if($_GET['password'] != $_GET['password2']) 
{ 
echo "两次密码输入不相同"; 
$founderr = true; 
} 

if(!$founderr) 
{ 
?> 
<html> 
<head> 
<title>Form</title> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
</head> 

<body> 
<table width="271" border="0" align="center" cellpadding="0" cellspacing="0"> 
<tr> 
<td width="85"><div align="right">姓名：</div></td> 
<td width="186"><?php echo $_GET['username'] ?></td> 
</tr> 
<tr> 
<td><div align="right">密码：</div></td> 
<td><?php echo $_GET['password'] ?></td> 
</tr> 
<tr> 
<td><div align="right">性别：</div></td> 
<td><?php if($_GET['sex']==0) echo "男"; else echo "女" ?></td> 
</tr> 
<tr> 
<td><div align="right">生日：</div></td> 
<td><?php echo $_GET['birthday'] ?></td> 
</tr> 
<tr> 
<td><div align="right">E-mail：</div></td> 
<td><?php echo $_GET['email'] ?></td> 
</tr> 
<tr> 
<td><div align="right">职业：</div></td> 
<td><?php echo $_GET['job'] ?></td> 
</tr> 
</table> 
</body> 
</html> 
<?php 
} 
?>