PHP jQuery表单,带验证具体实现方法

 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

<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

<?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;  
    }  
?>