实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>1.用实例来创建用户表单</title> <style type="text/css"> table { background-color: wheat; box-shadow: 3px 3px 3px #888; border-radius: 3%; padding: 15px; margin: 30px auto; } table td { padding: 8px; } table caption { font-size: 1.5em; margin-bottom: 10px; } textarea { resize: none; } form button { width: 100px; height: 30px; border: none; background-color: skyblue; color: white; } form button:hover { background-color: orangered; font-size: 1.1em; cursor: pointer; } </style> </head> <body> <form> <table> <caption>用户注册</caption> <tr> <td><label for="email">邮箱:</label></td> <td><input type="text" name="email" id="email" autofocus=""></td> </tr> <tr> <td><label for="password1">密码:</label></td> <td><input type="password" name="password1" id="password1"></td> </tr> <tr> <td><label for="password2">确认:</label></td> <td><input type="password" name="password2" id="password2"></td> </tr> <tr> <td><label for="secret">性别:</label></td> <td><input type="radio" name="gender" id="male" value="male" for="male"><label for="male">男</label> <input type="radio" name="gender" id="female" value="female" for="female"><label for="female">女</label> <input type="radio" name="gender" id="secret" value="secret" checked="" for="secret"><label for="secret">保密</label></td> </tr> <tr> <td><label for="">级别:</label></td> <td> <select name="level" id="level"> <option value="0">小白</option> <option value="1" selected="">中级</option> <option value="2">大神</option> </select> </td> </tr> <tr> <td><label for="PHP">语言:</label></td> <td><input type="checkbox" name="lang[]" id="php" value="php" checked=""><label for="PHP">PHP</label> <input type="checkbox" name="lang[]" id="Java" value="Java"><label for="Java">Java</label> <input type="checkbox" name="lang[]" id="Python" value="Python"><label for="Python">Python</label> <input type="checkbox" name="lang[]" id="C++" value="C++"><label for="C++"JavaScript">C++</label></td> <tr> <td><label for="comment">简介:</label></td> <td><textarea name="conment" id="conment" cols="30" rows="3"></textarea></td> </tr> <tr> <td colspan="2" align="center"> <button type="submit" name="submit" id="submit" value="submit">提交</button> </td> </tr> </table> </form> <script type="text/javascript" src="js/jquery-3.3.1.js"></script> <script type="text/javascript"> //所有的表单数据的验证全部使用AJAX完成,但是为了代码的简洁与可读性,操作类型使用GET //邮箱验证 $('#email').blur(function(){ //注意:这里是获取email的id,因此正确为:'#mail' //采用post $.post('admin/check.php?check=email','email='+$('#email').val(),function(data){ //url后面加?check=email; data用'email='+$拼接,属性为:'#mail' , 回调函数为data ,即function(data) switch(data.status){ case 0: $('td').find('span').remove() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#email').after('<span>').next().text(data.msg).css('color','red').prev().focus() //当输入错误,自动把焦点移到SPAN前面的元素INPUT上面来并设置焦点! break; case 1: $('td').find('span').remove() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#email').after('<span>').next().text(data.msg).css('color','red').prev().focus() //当输入错误,自动把焦点移到SPAN前面的元素INPUT上面来并设置焦点! break; case 2: $('td').find('span').remove() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#email').after('<span>').next().text(data.msg).css('color','green') //直到输入正确,邮箱可用,才允许跳转! break; } },'json') //注意:此处是,'json' }) //密码验证: $('#password1').blur(function(){ if($('#email').val().length ==0){ return false } $.post('admin/check.php?check=password1','password1='+$('#password1').val(),function(data){ if (data.status == 0) { //以下#PASSOWD的必须加引号!!! $('#password1').after('<span>').next().text(data.msg).css('color','red').prev().focus(); $('td').find('span').first().remove(); } },'json') //此处的JSON必须要加引号!! }) //确认密码验证: $('#password2').blur(function(){ if($('#email').val().length ==0){ return false } if($('#password1').val().length ==0){ return false } $.post('admin/check.php?check=password2',{ password1: $('#password1').val(), password2: $('#password2').val() },function(data){ switch(data.status){ //根据data的statis状态来进行判断 case 0: //当前数据空值,注意:这里是冒号,不是分号,看清楚!!! $('td').find('span').empty() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#password2').after('<span>').next().text(data.msg).css('color','red').prev().focus() //当输入错误,自动把焦点移到SPAN前面的元素INPUT上面来并设置焦点! break; case 1: $('td').find('span').remove() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#password2').after('<span>').next().text(data.msg).css('color','red').prev().focus() //当输入错误,自动把焦点移到SPAN前面的元素INPUT上面来并设置焦点!*/ break; case 2: $('td').find('span').remove() //获取到所有的TD,查询所有的SPAN元素,杜绝掉! $('#password2').after('<span>').next().text(data.msg).css('color','green') //直到输入正确,邮箱可用,才允许跳转! break; } },'json') //此处的JSON必须要加引号!! }) </script> </body> </html>
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实例
<?php // echo '<pre>'; // print_r($_POST); // echo $_GET['check']; //用url中check值进行判断,确定验证的字段 switch ($_GET['check']) { // echo '验证邮箱'; //测试数据 case 'email': $email = $_POST['email']; //注意:设置邮箱的请求类型 if (empty($email)){ //不能用ISSET()验证,会出错。用empty() // exit()['status' =>0,'msg'=>'邮箱不能为空'] // 三种状态判断结构: exit(json_encode(['status' =>0,'msg' =>'邮箱不能为空'])); //exit(['status'=>0,'msg'=>'邮箱不能为空'])先输出一个数组;将一个字符串进行编码。 } else if (in_array($email,['admin@php.cn','kevinw@php.cn'])) { //注意:这里是in_array,别写错了!!! exit(json_encode(['status' =>1,'msg' =>'邮箱已占用'])); } else { exit(json_encode(['status' =>2,'msg' =>'邮箱可用'])); } break; // 密码验证 case 'password1': $password1 = $_POST['password1']; if (empty($password1)){ exit(json_encode(['status' =>0,'msg' =>'密码不能为空'])); } break; // 确认密码验证 case 'password2': $password1 = $_POST['password1']; $password2 = $_POST['password2']; if (empty($password2)){ exit(json_encode(['status' =>0,'msg' =>'确认密码不能为空'])); } else if ($password1 != $password2) { exit(json_encode(['status' =>1,'msg' =>'二次密码不相等'])); } else { exit(json_encode(['status' =>2,'msg' =>'验证通过'])); } break; } //注意这里的假设语句: // switch ($_GET['check']) { // case 'email': // $email = $_POST['email']; // if (empty($email)){ // exit(json_encode(['status' =>0,'msg' =>'中文'])); // } else if (in_array($mail,['admin@php.cn','kevinw@php.cn'])){ // exit(json_encode(['status' =>1,'msg' =>'中文'])); // } else { // exif(json_encode(['status' =>2,'msg' =>'中文'])) // } // break; // }
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