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Javascript 由于json,Ajax表单无法工作(抛出的parsererror:SyntaxError:json.parse:json数据第1行第1列的数据意外结束)_Javascript_Php_Jquery_Json_Ajax - Fatal编程技术网

Javascript 由于json,Ajax表单无法工作(抛出的parsererror:SyntaxError:json.parse:json数据第1行第1列的数据意外结束)

Javascript 由于json,Ajax表单无法工作(抛出的parsererror:SyntaxError:json.parse:json数据第1行第1列的数据意外结束),javascript,php,jquery,json,ajax,Javascript,Php,Jquery,Json,Ajax,我知道这个问题以前被问过很多次,但我已经尝试了所有的解决方案,但没有任何效果,所以我的问题是我无法使用ajax从服务器加载json响应我的script.js在js文件夹中,我的sendMail.php在includes文件夹中,而index.php在根目录中文件夹也当我提交一些信息时,状态为200表示一切正常,但由于json响应,我无法用我的php代码检查它们 index.php <!DOCTYPE html> <html> <head> <ti

我知道这个问题以前被问过很多次,但我已经尝试了所有的解决方案,但没有任何效果,所以我的问题是我无法使用ajax从服务器加载
json
响应我的
script.js
在js文件夹中,我的
sendMail.php
在includes文件夹中,而
index.php
在根目录中文件夹也当我提交一些信息时,状态为200表示一切正常,但由于
json
响应,我无法用我的php代码检查它们

index.php

<!DOCTYPE html>
<html>
<head>
    <title>Booking</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="js/script.js"></script>
</head>
<body>
    <form action="includes/sendMail.php"  method="POST" name="reservation-form"  id="reservation-form">
        <div>
            <select class="select-dropbox" name="mail-hour">
                <option value="" disabled selected>Hour</option>
                <option value="1">1</option>
                <option value="2">2</option>
            </select>
        </div>

        <div>
            <input type="text" name="mail-phone" placeholder="Phone Number"
            >
        </div>
        <div>
            <input type="text" name="mail-email" placeholder="Email Address" >
        </div>
        <div>
            <textarea name="mail-msg" placeholder="Your Message"  ></textarea>
        </div>
        <div id="check-form">
        </div>
        <div>
            <button id="mail-submit" name="mail-submit" type="submit">BOOK A TABLE</button>
        </div>
    </form>
</body>
</html>
        <div>
        <input type="hidden" id="mail-submit-hidden" name="mail-submit" value="0" >
        <button id="mail-submit" type="submit">BOOK A TABLE</button>
    </div>
</form>

预订
时辰
1.
2.
预定桌子
script.js

$(document).ready(function(){
  $('#mail-submit').click(function(event){
    event.preventDefault();
    $.ajax({
      contentType: "application/json; charset=utf-8",
      dataType: 'JSON',
      url: 'includes/sendMail.php',
      type: 'POST',
      data: $('#reservation-form').serialize(),
      beforeSend: function(xhr){
        $('#mail-submit').html('SENDING...');
      },
      success: function(response){
       if(respo,se){
        alert(response);
        if(response['signal'] == 'ok'){
         $('#check-form').html('<div>'+ response['res-msg']  +'</div>');

       }
       else{
        $('#check-form').html('<div>'+ response['res-msg'] +'</div>');
      }
    }
  },
  error: function(xhr, status, thrown){
    alert("xhr: "+xhr+" status: "+status+" thrown: "+thrown);
    $('#check-form').html('<div>An Error occurs. Please try again.</div>');
  },
  complete: function(){

    $('#mail-submit').html('BOOK A TABLE');
  }
});
  });
});
event.preventDefault();
$('#mail-submit-hidden').val('1');
$.ajax({
$(文档).ready(函数(){
$(“#邮件提交”)。单击(功能(事件){
event.preventDefault();
$.ajax({
contentType:“应用程序/json;字符集=utf-8”,
数据类型:“JSON”,
url:'includes/sendMail.php',
键入:“POST”,
数据:$('#保留表单')。序列化(),
发送前:函数(xhr){
$('#mail submit').html('SENDING…');
},
成功:功能(响应){
如果(代表,东南){
警报(响应);
如果(响应['signal']='ok'){
$('#检查表单').html(''+response['res-msg']+'');
}
否则{
$('#检查表单').html(''+response['res-msg']+'');
}
}
},
错误:函数(xhr、状态、抛出){
警报(“xhr:+xhr+”状态:“+status+”抛出:“+抛出”);
$(“#检查表单”).html('发生错误,请重试');
},
完成:函数(){
$('#mail submit').html('BOOK A TABLE');
}
});
});
});
sendMail.php

<?php
if (isset($_POST['mail-submit'])) {
    $hour = trim($_POST['mail-hour']);
    $phone = trim($_POST['mail-phone']);
    $email = trim($_POST['mail-email']);
    $message = trim($_POST['mail-msg']);
    if($hour != null && $phone != null && $email != null){
        if(!filter_var($email, FILTER_VALIDATE_EMAIL)) {
            $signal = 'bad';
            $msg = 'Invalid email. Please check';
        }
        else {
            $signal = 'ok';
            $msg = 'Form submitted';
        }
    }
    else{
        $signal = 'bad';
        $msg = 'Please fill in all the fields.';
    }
    $data = array(
        'signal' => $signal,
        'res-msg' => $msg
    );
    echo json_encode($data);
}   
?>


基本上,表单数据需要不同的序列化方法。这里也提到了类似的事情:

下面是您应该用于JS的代码。请注意,正在使用serializeObject而不是serialize。我无法执行PHP代码,但您面临的序列化问题现在将得到修复,这也将修复您的PHP代码

$.fn.serializeObject = function()
{
    var o = {};
    var a = this.serializeArray();
    $.each(a, function() {
        if (o[this.name] !== undefined) {
            if (!o[this.name].push) {
                o[this.name] = [o[this.name]];
            }
            o[this.name].push(this.value || '');
        } else {
            o[this.name] = this.value || '';
        }
    });
    return o;
};


$(document).ready(function(){
  $('#mail-submit').click(function(event){
    event.preventDefault();
    var d = $('#reservation-form').serializeObject();
    d = JSON.stringify(d);
    $.ajax({
      contentType: "application/json; charset=utf-8",
      dataType: 'JSON',
      url: 'includes/sendMail.php',
      type: 'POST',
      data: d,
      beforeSend: function(xhr){
        $('#mail-submit').html('SENDING...');
      },
      success: function(res){
       if(res){
        var response=parseJSON(res);
        alert(response);
        if(response['signal'] == 'ok'){
         $('#check-form').html('<div>'+ response['res-msg']  +'</div>');

       }
       else{
        $('#check-form').html('<div>'+ response['res-msg'] +'</div>');
      }
    }
  },
  error: function(xhr, status, thrown){
    alert("xhr: "+xhr+" status: "+status+" thrown: "+thrown);
    $('#check-form').html('<div>An Error occurs. Please try again.</div>');
  },
  complete: function(){

    $('#mail-submit').html('BOOK A TABLE');
  }
});
  });
});
$.fn.serializeObject=函数()
{
var o={};
var a=this.serializeArray();
$.each(a,function(){
if(o[this.name]!==未定义){
如果(!o[this.name].push){
o[this.name]=[o[this.name]];
}
o[this.name].push(this.value | |“”);
}否则{
o[this.name]=this.value | |“”;
}
});
返回o;
};
$(文档).ready(函数(){
$(“#邮件提交”)。单击(功能(事件){
event.preventDefault();
var d=$(“#保留形式”).serializeObject();
d=JSON.stringify(d);
$.ajax({
contentType:“应用程序/json;字符集=utf-8”,
数据类型:“JSON”,
url:'includes/sendMail.php',
键入:“POST”,
数据:d,
发送前:函数(xhr){
$('#mail submit').html('SENDING…');
},
成功:功能(res){
如果(res){
var-response=parseJSON(res);
警报(响应);
如果(响应['signal']='ok'){
$('#检查表单').html(''+response['res-msg']+'');
}
否则{
$('#检查表单').html(''+response['res-msg']+'');
}
}
},
错误:函数(xhr、状态、抛出){
警报(“xhr:+xhr+”状态:“+status+”抛出:“+抛出”);
$(“#检查表单”).html('发生错误,请重试');
},
完成:函数(){
$('#mail submit').html('BOOK A TABLE');
}
});
});
});
在此处使用HTML/JS代码:


希望这有帮助

表单数据基本上需要不同的序列化方法。这里也提到了类似的事情:

下面是您应该用于JS的代码。请注意,正在使用serializeObject而不是serialize。我无法执行PHP代码,但您面临的序列化问题现在将得到修复,这也将修复您的PHP代码

$.fn.serializeObject = function()
{
    var o = {};
    var a = this.serializeArray();
    $.each(a, function() {
        if (o[this.name] !== undefined) {
            if (!o[this.name].push) {
                o[this.name] = [o[this.name]];
            }
            o[this.name].push(this.value || '');
        } else {
            o[this.name] = this.value || '';
        }
    });
    return o;
};


$(document).ready(function(){
  $('#mail-submit').click(function(event){
    event.preventDefault();
    var d = $('#reservation-form').serializeObject();
    d = JSON.stringify(d);
    $.ajax({
      contentType: "application/json; charset=utf-8",
      dataType: 'JSON',
      url: 'includes/sendMail.php',
      type: 'POST',
      data: d,
      beforeSend: function(xhr){
        $('#mail-submit').html('SENDING...');
      },
      success: function(res){
       if(res){
        var response=parseJSON(res);
        alert(response);
        if(response['signal'] == 'ok'){
         $('#check-form').html('<div>'+ response['res-msg']  +'</div>');

       }
       else{
        $('#check-form').html('<div>'+ response['res-msg'] +'</div>');
      }
    }
  },
  error: function(xhr, status, thrown){
    alert("xhr: "+xhr+" status: "+status+" thrown: "+thrown);
    $('#check-form').html('<div>An Error occurs. Please try again.</div>');
  },
  complete: function(){

    $('#mail-submit').html('BOOK A TABLE');
  }
});
  });
});
$.fn.serializeObject=函数()
{
var o={};
var a=this.serializeArray();
$.each(a,function(){
if(o[this.name]!==未定义){
如果(!o[this.name].push){
o[this.name]=[o[this.name]];
}
o[this.name].push(this.value | |“”);
}否则{
o[this.name]=this.value | |“”;
}
});
返回o;
};
$(文档).ready(函数(){
$(“#邮件提交”)。单击(功能(事件){
event.preventDefault();
var d=$(“#保留形式”).serializeObject();
d=JSON.stringify(d);
$.ajax({
contentType:“应用程序/json;字符集=utf-8”,
数据类型:“JSON”,
url:'includes/sendMail.php',
键入:“POST”,
数据:d,
发送前:函数(xhr){
$('#mail submit').html('SENDING…');
},
成功:功能(res){
如果(res){
var-response=parseJSON(res);
警报(响应);
如果(响应['signal']='ok'){
$('#检查表单').html(''+response['res-msg']+'');
}
否则{
$('#检查表单').html(''+response['res-msg']+'');
}
}
},
错误:函数(xhr、状态、抛出){
警报(“xhr:+xhr+”状态:“+status+”抛出:“+抛出”);
$(“#检查表单”).html('发生错误,请重试');
},
完成:函数(){
$('#mail submit').html('BOOK A TABLE');
}
});
});
});
在此处使用HTML/JS代码:


希望这有帮助

我已经测试了您的代码,我认为您的php脚本(sendMail.php)第2行有问题(if(isset($\u POST['mail-submit'])),其中“mail submit”没有序列化(**因为序列化不包括submit按钮值),这就是为什么代码没有首先实现if