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; 
    } 
?>