php - 由 Jquery (AJAX) 在服务器的 PHP 代码中发送的调试变量

Question

我在网络托管处有一个主机服务器，我的 PHP 文件位于服务器的一个文件夹中。从我的 HTML 表单中，我使用 Jquery AJAX 发送一些数据，我喜欢在服务器端的 PHP 代码中查看所有这些变量。我的 Jquery AJAX 代码如下。

function sendtoServer() {

     $.ajax({
        url: "advertisementdatavalidationatserver.php",
        type: "POST",
        data: $("#landedForm").serialize(), 
        success:  function(ret){

});
}

我在服务器端的PHP代码是

<?php
$data = array();
$data['error'] = false;

if ($_SERVER["REQUEST_METHOD"] == "POST") {

    if(!isset($_POST['purpose'])){ 
        $data['error'] = true;
        $data['message'][] = "Purposeerror";
    }

    if(!isset($_POST['type'])){ 
        $data['error'] = true;
        $data['message'][] = "Typeerror";
    }

    if ($_POST['type'] == "With_RC" || $_POST['type'] == "With_BrickNorcal") { 

        if ($_POST['stories'] == "Stories"){
            $data['error'] = true;
            $data['message'][] = "Storieserror";        
        }


        if ($_POST['bedrooms'] == "Bedrooms") {        
            $data['error'] = true;
            $data['message'][] = "Bedroomserror";        
        }

        if ($_POST['bathrooms'] == "Bathrooms") {        
            $data['error'] = true;
            $data['message'][] = "Bathroomserror";        
        }

    }

    if ($_POST['divs_states'] == "Division") {        
            $data['error'] = true;
            $data['message'][] = "Divisionerror";        
    }

    if ($_POST['township'] == "Township") {        
            $data['error'] = true;
            $data['message'][] = "Townshiperror";        
    }

    if ($_POST['price']=="") {        
            $data['error'] = true;
            $data['message'][] = "Priceerror";        
    }else if (!preg_match('/^\d+$/', $_POST['price']) ) {        
            $data['error'] = true;
            $data['message'][] = "Priceinvalid";        
    } 

    if ($_POST['length']=="") {        
            $data['error'] = true;
            $data['message'][] = "Lengtherror";        
    }else if (!preg_match('/^\d+$/', $_POST['length']) ) {        
            $data['error'] = true;
            $data['message'][] = "Lengthinvalid";        
    } 

    if ($_POST['width']=="") {        
            $data['error'] = true;
            $data['message'][] = "Widtherror";        
    }else if (!preg_match('/^\d+$/', $_POST['width']) ) {        
            $data['error'] = true;
            $data['message'][] = "Widthinvalid";        
    }    

    if(!isset($_POST['haveaircon'])){ 
        $data['error'] = true;
        $data['message'][] = "Airconerror";
    }

    if ($_POST['possession'] == "Possession") {        
            $data['error'] = true;
            $data['message'][] = "Possessionerror";        
    }

    if($_POST['date']==""){ 
        $data['error'] = true;
        $data['message'][] = "Dateerror";
    }

    if($_POST['textarea'] == "Please enter additional information here..." || $_POST['textarea'] ==""){ 
        $data['error'] = true;
        $data['message'][] = "Textareaerror";
    }

    if(!isset($_POST['agentowner'])){ 
        $data['error'] = true;
        $data['message'][] = "Agentownererror";
    }

    if($_POST['name'] == ""){ 
        $data['error'] = true;
        $data['message'][] = "Nameerror";
    }

    if($_POST['phone'] == ""){ 
        $data['error'] = true;
        $data['message'][] = "Phoneerror";
    }else if((strlen($_POST['phone']) < 6) || !preg_match('/^\d+$/', $_POST['phone'])){
        $data['error'] = true;
        $data['message'][] = "Phoneinvalid";
    }

    if(!isset($_POST['email']) || empty($_POST['email'])){ 
        $data['error'] = true;
        $data['message'][] = "Emailrequired";
    }else if(!filter_var($_POST["email"], FILTER_VALIDATE_EMAIL)) {
        $data['error'] = true;
        $data['message'][] = "Emailinvalid";
    }

    if(!$data['error']){
        // No errors, save into database

        $con = mysql_connect("localhost","thitsun_admin","z4iufn8n##");

        if (!$con)
        {
           $data['error'] = true;
           $data['message'][] = "Connectionerror";
           die('Could not connect: ' . mysql_error());
        }else{

           mysql_select_db("thitsun_properties_database", $con);

           $purpose = mysql_real_escape_string($_POST['purpose']);           
           $type = mysql_real_escape_string($_POST['type']);
           $stories = NULL;
           $bedrooms = NULL;
           $bathrooms = NULL;
           if ($_POST['type'] == "With_RC" || $_POST['type'] == "With_BrickNorcal") { 
                $stories = intval($_POST['stories']);
                $bedrooms = intval($_POST['bedrooms']);
                $bathrooms = intval($_POST['bathrooms']);
           }
           $divs_states = mysql_real_escape_string($_POST['divs_states']);
           $township = mysql_real_escape_string($_POST['township']);
           $price = intval($_POST['price']);
           $length = intval($_POST['length']);
           $width = intval($_POST['width']);

           if($_POST['haveaircon'] == "yes")
               $haveaircon = "yes";
           else
               $haveaircon = "no";
           if($_POST['havetelephone'] == "yes")
               $havetelephone = "yes";
           else
               $havetelephone = "no";

           $possession = mysql_real_escape_string($_POST['possession']);
           $date = mysql_real_escape_string($_POST['date']);
           $textarea = null;
           if($_POST['textarea'] != "Please enter additional information here..." || $_POST['textarea'] != ""){ 
              $textarea = mysql_real_escape_string($_POST['textarea']);
           }

           $agentowner = mysql_real_escape_string($_POST['agentowner']);
           $name = mysql_real_escape_string($_POST['name']);
           $phone = mysql_real_escape_string($_POST['phone']);
           $email = mysql_real_escape_string($_POST['email']);

           $address = NULL;
           if($_POST['address'] != "Please key in full address if you are ok..." || $_POST['address'] != ""){ 
              $address = mysql_real_escape_string($_POST['address']);
           }          

           $query = "INSERT INTO `thitsun_properties_database`.`registered_properties`(`id`, `purpose`, `type`, `num_stories`, `bedrooms`, `bathrooms`, `div_state`, `township`, `price`, `length`, `width`, `have_phone`, `have_aircon`, `possession`, `available_date`, `description`, `agentowner`, `name`, `phone`, `email`, `address`, `submitteddate`) VALUES (NULL,'$purpose', '$type','$stories', '$bedrooms', '$bathrooms', '$divs_states', '$township', '$price', '$length', '$width', '$havetelephone', '$haveaircon', '$possession', '$date', '$textarea', '$agentowner', '$name', '$phone', '$email', '$address',CURRENT_TIMESTAMP);";
   // `id`, `purpose`, `type`, `num_stories`, `bedrooms`, `bathrooms`, `div_state`, `township`, `price`, `length`, `width`, `have_phone`, `have_aircon`, `possession`, `available_date`, `description`, `agentowner`, `name`, `phone`, `email`, `address`, //`submitteddate`


    //'$purpose', '$type','$stories', '$bedrooms', '$bathrooms', '$divs_states', '$township', '$price', '$length', '$width', '$havetelephone', '$haveaircon', '$possession', '$date', '$textarea', '$agentowner', '$name', '$phone', '$email', //'$address',CURRENT_TIMESTAMP
           if(mysql_query($query,$con) or die("Insertion Failed:".mysql_error()))
           {
              if(mysql_affected_rows($con)!=1){
                 $data['error'] = true;
                 $data['message'][] = "Connectionerror";
              }
           }

            mysql_close($con);
        }

    }
}

// then echo the $data array you have built as JSON to use in jquery. 
//This will be what is returned in your AJAX request
header('Content-Type: application/json; charset=UTF-8');
echo json_encode($data);
?>

我喜欢在将它们放入数据库之前调试所有这些变量，例如 $name、$email、$phone。当然，我可以在它们成功保存到数据库后进行检查。但在某些情况下，如果它们无法保存到数据库中，我需要检查这些变量中的值是什么。

所有讨论都说要使用 print、print_r 或 echo。我使用了它们，但我没有看到任何输出，或者坦率地说不知道在哪里可以看到这些输出。我检查了控制台 (F12)，但那里什么也没有。

我的查询是我在位于主机服务器的 .php 文件中有 PHP 代码。如何在 PHP 代码中查看通过 AJAX 发送的变量？

谢谢

Answer 1

我这样做的方法是将 print_r($_POST) 的输出写入服务器上的文件，因为正如您所说，没有可以看到数据的控制台或窗口进入为您的 AJAX 调用提供服务的服务器脚本

<?php
$data = array();
$data['error'] = false;

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    file_put_contents('somefilename.txt', print_r($_POST,true), FILE_APPEND);

    // your other code

使用 FILE_APPEND 选项会将每次调用添加到文件末尾，这样您就可以在每次更改时检查 javascript(AJAX) 代码中所做的更改