我正在使用ajax从输入字段中获取文本并通过php检查它们而不是将它们存储在数据库中...但是在某个地方，某些地方出了问题，我得到Unexpected token s in JSON at position 0这个错误..
$(".d-f-sub").on('click',function(e){
e.preventDefault();
resetErrors();
$('.inputTxtError').children('form input').css({'border-color' : '','box-shadow' : ''});
var data = {};
$.each($('form input, form select'), function(i, v) {
if (v.type !== 'submit') {
data[v.name] = v.value;
}
});
$.ajax({
dataType: "JSON",
type: "POST",
data: data,
cache: false,
url: "/ajax/diet/diet-page-error-display.php",
success: function(result){
if(result === "true"){
console.log('raboti do tuk');
$(".d-f-sub").submit();
window.location = "http://www.homepage.co.uk/thankyou";
return false;
}else {
console.log('ne raboti');
$.each(result, function(i, v) {
//console.log(i + " => " + v); // view in console for error messages
var msg = '<label class="diet-error" for="'+i+'" style="background:red;">'+v+'</label>';
$('input[name="' + i + '"], select[name="' + i + '"]').css({'border-color' : '#cc0000','box-shadow' : '0 0 10px #cc0000'}).closest('div').addClass('inputTxtError').after(msg);
});
var keys = Object.keys(result);
$('input[name="'+keys[0]+'"]').focus();
}
return false;
},
error: function(jqXHR, textStatus, errorThrown) {
//console.log(JSON.stringify(result));
alert(jqXHR.status);
alert(textStatus);
alert(errorThrown);
}
});
function resetErrors() {
$('form input, form select').removeClass('inputTxtError');
$('label.diet-error').remove();
}
});<?php
header('Content-type:application/json;charset=utf-8');
if(isset($_POST)){
if (filter_var($_POST['age'], FILTER_VALIDATE_INT) === false){
$_SESSION['errors']['age'] = 'Моля използвайте само цифри в полето за Вашата възраст!';
}
if (filter_var($_POST['height'], FILTER_VALIDATE_INT) === false){
$_SESSION['errors']['height'] = 'Моля използвайте само цифри в полето за Вашата височина!';
}
if (filter_var($_POST['weight'], FILTER_VALIDATE_INT) === false){
$_SESSION['errors']['weight'] = 'Моля използвайте само цифри в полето за Вашато тегло!';
}
if (filter_var($_POST['budget'], FILTER_VALIDATE_INT) === false){
$_SESSION['errors']['budget'] = 'Моля използвайте само цифри в полето за Вашият бюджет!';
}
if (filter_var($_POST['email'],FILTER_VALIDATE_EMAIL) === false){
$_SESSION['errors']['email'] = 'Моля въведете валиден имейл адрес!';
}
if(empty($_POST['email'])){
$_SESSION['errors']['email'] = 'Моля въведете имейл за връзка';
}
if(empty($_POST['age'])){
$_SESSION['errors']['age'] = 'Моля въведете Вашата възраст!';
}
if(empty($_POST['height'])){
$_SESSION['errors']['height'] = 'Моля въведете Вашата височина!';
}
if(empty($_POST['weight'])){
$_SESSION['errors']['weight'] = 'Моля въведете Вашето тегло!';
}
if(!isset($_POST['sex'])){
$_SESSION['errors']['sex'] = 'Моля изберете пол !';
}
if(!isset($_POST['activity'])){
$_SESSION['errors']['activity'] = 'Моля изберете активност! !';
}
if(!isset($_POST['goal'])){
$_SESSION['errors']['goal'] = 'Моля изберете цел !';
}
}//
if(count($_SESSION['errors']) > 0){
if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest')
{
echo json_encode($_SESSION['errors']);
unset($_SESSION['errors']);
exit();
}
echo "<ul>";
foreach($_SESSION['errors'] as $key => $value){
echo "<li>" . $value . "</li>";
}
echo "</ul>";
unset($_SESSION['errors']);
exit();
}else{
$age = clean_xss_int($_POST['age']);
$height = clean_xss_int($_POST['height']);
$weight = clean_xss_int($_POST['weight']);
$email = clean_xss($_POST['email']);
$sex = clean_xss($_POST['sex']);
$activity = clean_xss($_POST['activity']);
$goal = clean_xss($_POST['goal']);
$diseases = clean_xss($_POST['diseases']);
$liked_foods = clean_xss($_POST['liked_foods']);
$hated_foods = clean_xss($_POST['hated_foods']);
$budget = clean_xss_int($_POST['budget']);
$intership = clean_xss($_POST['training']);
$description = clean_xss($_POST['eat_usually']);
$data = array(
'age' => $age,
'height' => $height,
'weight' => $weight,
'email' => $email,
'sex' => $sex,
'activity' => $activity,
'goal' => $goal,
'diseases' => $diseases,
'liked_foods' => $liked_foods,
'hated_foods' => $hated_foods,
'budget' => $budget,
'intership' => $intership,
'description' =>$description
);
//Here is the query usually
echo json_encode($data);
?>
无论我做什么，总是返回Unexpected token s in JSON at position 0。现在我试图删除DataType: "JSON"使用过的Content-Type标头，使用json_encode（）（有JSON的结果）编码）
在json之前也尝试过utf8_encode（），但它需要一个字符串而不是数组。 谢谢！
答案 0 :(得分：0)
好的，所以我整天都在犯这个错误，有适合我的解决方案。
首先，我检查了JSON在www.jsonlint.com中的有效性是否有效。
第二个我的clean_xss_int函数是错误的，如果它是数组，我输入的值就是，因此最终结果是数字字段的字符串和文本字段的数组。
第三个（因为我是ajax的新手）我检查了整个php端，并意识到即使有空字段也必须返回错误或返回数据数组ajax得到它两个成功的操作.Plus没有需要再次将$ data数组传递给json，因为我只需要插入查询。所以我写了一个数组，我在ajax中返回成功，即数组（'0'=＆gt;'true'）;我正在使用ajax中的字符串并检查成功是否等于字符串'true'。代码如何显示：
$.ajax({
type: "POST",
data: data,
dataType: "JSON",
url: "/ajax/diet/diet-page-error-display.php",
success: function(result){
JSON.stringify(result);// <---- new ;d
if(result == "true"){ <--- comparing with 2 x = instead of 3
$(".d-f-sub").submit();
window.location = "http://www.musclevale.com/diet";
return false;
}else {
$.each(result, function(i, v) {
var msg = '<label class="diet-error" for="'+i+'" style="background:red;">'+v+'</label>';
$('input[name="' + i + '"], select[name="' + i + '"]').css({'border-color' : '#cc0000','box-shadow' : '0 0 10px #cc0000'}).closest('div').addClass('inputTxtError').after(msg);
});
var keys = Object.keys(result);
$('input[name="'+keys[0]+'"]').focus();
}
return false;
},
error: function(jqXHR, textStatus, errorThrown) {
alert(jqXHR.status);
alert(textStatus);
alert(errorThrown);
}
});<?php
$age = clean_xss_int($_POST['age']);
$height = clean_xss_int($_POST['height']);
$weight = clean_xss_int($_POST['weight']);
$email = clean_xss($_POST['email']);
$sex = clean_xss($_POST['sex']);
$activity = clean_xss($_POST['activity']);
$goal = clean_xss($_POST['goal']);
$diseases = clean_xss($_POST['diseases']);
$liked_foods = clean_xss($_POST['liked_foods']);
$hated_foods = clean_xss($_POST['hated_foods']);
$budget = clean_xss_int($_POST['budget']);
$intership = clean_xss($_POST['training']);
$description = clean_xss($_POST['eat_usually']);
$data = array(
'age' => $age,
'height' => $height,
'weight' => $weight,
'email' => $email,
'sex' => $sex,
'activity' => $activity,
'goal' => $goal,
'diseases' => $diseases,
'liked_foods' => $liked_foods,
'hated_foods' => $hated_foods,
'budget' => $budget,
'intership' => $intership,
'description' =>$description
);
$fields = implode(',',array_keys($data));
$values = '\'' . implode('\', \'', $data) . '\'';
$query = mysqli_query($connect,"INSERT INTO buyed_diets ($fields) VALUES ($values)");
echo json_encode(array('0' => 'true'));// <----new ;d
?>