Email检测,密码重复检测,可以用于表单发送的各种环境，例如发送反馈，注册帐号

复制代码 代码如下:
<div id="container">
<?if( isset($_POST['send']) && (!validateName($_POST['name']) || !validateEmail($_POST['email']) || !validatePasswords($_POST['pass1'], $_POST['pass2']) || !validateMessage($_POST['message']) ) ):?>
<div id="error">
<ul>
<?if(!validateName($_POST['name'])):?>
<li><strong>Invalid Name:</strong> We want names with more than 3 letters!</li>
<?endif?>
<?if(!validateEmail($_POST['email'])):?>
<li><strong>Invalid E-mail:</strong> Stop cowboy! Type a valid e-mail please :P</li>
<?endif?>
<?if(!validatePasswords($_POST['pass1'], $_POST['pass2'])):?>
<li><strong>Passwords are invalid:</strong> Passwords doesn't match or are invalid!</li>
<?endif?>
<?if(!validateMessage($_POST['message'])):?>
<li><strong>Ivalid message:</strong> Type a message with at least with 10 letters</li>
<?endif?>
</ul>
</div>
<?elseif(isset($_POST['send'])):?>
<div id="error" class="valid">
<ul>
<li><strong>Congratulations!</strong> All fields are OK ;)</li>
</ul>
</div>
<?endif?>

<form method="post" id="customForm" action="">
<div>
<label for="name">Name</label>
<input id="name" name="name" type="text" />
<span id="nameInfo">What's your name?</span>
</div>
<div>
<label for="email">E-mail</label>
<input id="email" name="email" type="text" />
<span id="emailInfo">Valid E-mail please, you will need it to log in!</span>
</div>
<div>
<label for="pass1">Password</label>
<input id="pass1" name="pass1" type="password" />
<span id="pass1Info">At least 5 characters: letters, numbers and '_'</span>
</div>
<div>
<label for="pass2">Confirm Password</label>
<input id="pass2" name="pass2" type="password" />
<span id="pass2Info">Confirm password</span>
</div>
<div>
<label for="message">Message</label>
<textarea id="message" name="message" cols="" rows=""></textarea>
</div>
<div>
<input id="send" name="send" type="submit" value="Send" />
</div>
</form>
</div>

validation.php

复制代码 代码如下:
<?php
function validateName($name){
//if it's NOT valid
if(strlen($name) < 4)
return false;
//if it's valid
else
return true;
}
function validateEmail($email){
return ereg("^[a-zA-Z0-9]+[a-zA-Z0-9_-]+@[a-zA-Z0-9]+[a-zA-Z0-9.-]+[a-zA-Z0-9]+.[a-z]{2,4}$", $email);
}
function validatePasswords($pass1, $pass2) {
//if DOESN'T MATCH
if(strpos($pass1, ' ') !== false)
return false;
//if are valid
return $pass1 == $pass2 && strlen($pass1) > 5;
}
function validateMessage($message){
//if it's NOT valid
if(strlen($message) < 10)
return false;
//if it's valid
else
return true;
}
?>