register.html
<h1>用户注册</h1> <form method="post" action="register_verify.php"> <input type="text" placeholder="用户名"><br><br> <input type="password" placeholder="密码"><br><br> <input type="password" placeholder="重复密码"><br><br> <label>性别： <input type="radio" value="男" checked="checked">男 <input type="radio" value="女">女</label><br><br> <input type="email" placeholder="邮箱"><br><br> <button type="submit">注册</button> </form>
register_verify.php
<?php require "mysql.php"; //导入mysql.php访问数据库 $username=$_POST['username']; $password=$_POST['password']; $password2=$_POST['password2']; $sex=$_POST['sex']; $email=$_POST['email']; if(checkEmpty($username,$password,$password2,$sex,$email)){ if(checkpwd($password,$password2)){ if(checkEmail($email)){ if(insert($username,$password,$sex,$email)) echo"注册成功"; } } } //方法：判断是否为空 function checkEmpty($username,$password,$password2,$sex,$email){ if($username==null||$password==null||$password2==null){ echo '<html><head><Script Language="JavaScript">alert("用户名或密码为空");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } else{ if($sex==null){ echo '<html><head><Script Language="JavaScript">alert("性别为空");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } elseif($email==null){ echo '<html><head><Script Language="JavaScript">alert("邮箱为空");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } else{ return true; } } } //方法：检查两次密码是否相同 function checkpwd($password,$password2){ if($password==$password2) return true; else echo '<html><head><Script Language="JavaScript">alert("两次密码不一致");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } //方法：邮箱格式验证 function checkEmail($email){ $preg = '/^(\w{1,25})@(\w{1,16})(\.(\w{1,4})){1,3}$/'; if(preg_match($preg, $email)){ return true; }else{ echo '<html><head><Script Language="JavaScript">alert("邮箱格式有误");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } } //方法：将数据插入数据库中 function insert($username,$password,$sex,$email){ $conn=new Mysql(); $sql="insert into user VALUE (null,'$username','$password','$sex','$email')"; $result=$conn->sql($sql); if($result){ return true; } else{ echo '<html><head><Script Language="JavaScript">alert("写入数据库失败");</Script></head></html>' . "<meta http-equiv=\"refresh\" content=\"0;url=register.html\">"; } $conn->close(); }
验证码和数据库的实现方法前面写过，这里不再赘述。
可参考前面两篇文章：
PS：这里再为大家提供2款非常方便的正则表达式工具供大家参考使用：
JavaScript正则表达式在线测试工具：
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