我在web主机上有一个主机服务器，我的PHP文件存放在服务器上的一个文件夹中。在我的HTML表单中，我使用JqueryAJAX发送一些数据，并且我喜欢在服务器端查看PHP代码中的所有这些变量。我的Jquery AJAX代码如下。
function sendtoServer() {
$.ajax({
url: "advertisementdatavalidationatserver.php",
type: "POST",
data: $("#landedForm").serialize(),
success: function(ret){
});
}
我在服务器上的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);
?>
我喜欢在将这些变量放入数据库之前调试它们，比如$name, $email, $phone。当然，一旦它们成功保存到数据库中，我就可以进行检查。但在某些情况下，若它们不能保存到数据库中，我需要检查这些变量中的值。
所有讨论都说要使用print、print_r或echo。我使用了它们，但我没有看到任何输出，或者坦率地说，我不知道在哪里可以看到这些输出。我检查了控制台（F12），但什么都没有。
我的查询是，我在主机服务器中的一个.PHP文件中有PHP代码。如何在PHP代码中查看通过AJAX发送的变量？
感谢
我这样做的方法是将print_r($_POST)的输出写入服务器上的一个文件，因为正如你所说，没有控制台或窗口可以让你看到进入服务器脚本的数据，该脚本为你的AJAX调用提供服务
<?php
$data = array();
$data['error'] = false;
if ($_SERVER["REQUEST_METHOD"] == "POST") {
file_put_contents('somefilename.txt', print_r($_POST,true), FILE_APPEND);
// your other code
使用FILE_APPEND选项会将每个调用添加到文件的末尾，这样您就可以检查javascript（AJAX）代码中所做的更改以及您在中进行的每个更改
print、echo、print_r、var_dump和其他打印功能输出到视口-在大多数情况下，这将是浏览器。
如果您的文件index.php包含：
<?php echo "Hello, world!" ?>
访问//index.php将显示
你好，世界！
类似地，如果通过命令行执行，例如> php index.php，您将直接在终端中看到输出。
要查看print、print_r、echo和var_dump之间的差异，请参阅此帖子
将其添加到advertisementdatavalidationatserver.php:的前几行中
var_dump($_POST);
die();
打开web工具（例如chrome F12）单击"网络"选项卡。发出ajax请求。单击"重新响应"。响应将包含$_POST 的转储
这里有一个函数，可以记录当前目录的错误日志文件中的任何内容，如果你想将它们记录在某个目录中，只需将其添加到error_log 的第三个参数之前
<?php
//example of usage
_log("this is a string");
_log(array("key",4));
function _log($msg)
{
if(is_string($msg))
{
error_log("'n".$msg,3,"error_log");
}
else
{
error_log("'n".print_r($msg,true),3,"error_log");
}
}
?>
由PHP初始化的打印由Apache、Nginx等Web服务器进行解释。例如，文件index.php包含以下内容：
<html>
<title>Hello World</title>
<body>
<?php
print("Hello, World!");
?>
</body>
</html>
然后将该文件添加到Web服务器的文件夹中，例如/var/www/index.php，然后使用浏览器访问Web服务器，您可以看到PHP打印的输出。