Javascript PHP一直告诉我值为空
我在PHP脚本中设置了它,如果一个值为空,就这样说。我一直在控制台中收到一条消息,说该值为空,但我似乎不明白为什么,因为它对我来说似乎有一个值 这里是PHPJavascript PHP一直告诉我值为空,javascript,php,jquery,html,Javascript,Php,Jquery,Html,我在PHP脚本中设置了它,如果一个值为空,就这样说。我一直在控制台中收到一条消息,说该值为空,但我似乎不明白为什么,因为它对我来说似乎有一个值 这里是PHP $percentageOfMessages = $_POST["percentageOfMessages"]; $RemoveDeletedAccounts = $_POST["RemoveDeletedAccounts"]; $RemoveNoReply = $_POST["RemoveNoReply"]; $RemoveNoRespon
$percentageOfMessages = $_POST["percentageOfMessages"];
$RemoveDeletedAccounts = $_POST["RemoveDeletedAccounts"];
$RemoveNoReply = $_POST["RemoveNoReply"];
$RemoveNoResponse = $_POST["RemoveNoResponse"];
$mintchPercent = $_POST["mintchPercent"];
$minDistance = $_POST["minDistance"];
$maxDistance = $_POST["maxDistance"];
$blacklistUsernames = $_POST["blacklistUsernames"];
$pickText = $_POST["pickText"];
$userEmail = $_POST["userEmail"];
//$captcha = $_POST["captcha"];
//$num1 = $_POST["num1"];
//$num2 = $_POST["num2"];
if (empty($percentageOfMessages)) {
echo "percentageOfMessages";
}elseif (empty($mintchPercent)) {
echo "mintchPercent";
}elseif (empty($minDistance)) {
echo "minDistance";
}elseif (empty($maxDistance)) {
echo "maxDistance";
}elseif (empty($pickText)) {
echo "pickText";
}elseif (empty($userEmail)) {
echo "userEmail";
}else {
下面是涉及MindInstance的javascript/jquery
$('#minDistance').keyup(function() {
if (this.value != this.value.replace(/[^0-9\.]/g, '')) {
this.value = this.value.replace(/[^0-9\.]/g, '');
} else if ($(this).val() > 500) {
$(this).val('500');
} else if ($(this).val() < 0) {
$(this).val('0');
}
});
$('#minDistance').blur(function() {
if ($(this).val() > $('#maxDistance').val()) {
$(this).val('0');
}
});
function sendForm(e) {
e.preventDefault();
var formData = new FormData();
formData.append('percentageOfMessages', $('#percentageOfMessages').val());
if ($('RemoveDeletedAccounts').prop('checked')) {
formData.append('RemoveDeletedAccounts', "1");
} else {
formData.append('RemoveDeletedAccounts', "0");
}
if ($('RemoveNoReply').prop('checked')) {
formData.append('RemoveNoReply', "1");
} else {
formData.append('RemoveNoReply', "0");
}
if ($('RemoveNoResponse').prop('checked')) {
formData.append('RemoveNoResponse', "1");
} else {
formData.append('RemoveNoResponse', "0");
}
formData.append('minMatchPercent', $('#minMatchPercent').val());
//OTHER STUFFFFFFFFF
$.ajax({
type: 'POST',
xhr: function() { // Custom XMLHttpRequest
var myXhr = $.ajaxSettings.xhr();
if (myXhr.upload) { // Check if upload property exists
//myXhr.upload.addEventListener('progress',progressHandlingFunction, false); // For handling the progress of the upload
}
return myXhr;
},
cache: false,
processData: false,
contentType: false,
data: formData,
url: 'addAccounts.php',
success: function(data) {
console.log(data);
},
error: function(xhr, err) {
console.log("readyState: " + xhr.readyState + "\nstatus: " + xhr.status);
console.log("responseText: " + xhr.responseText);
}
});
}
$('#minDistance').keyup(函数(){
如果(this.value!=this.value.replace(/[^0-9\.]/g')){
this.value=this.value.replace(/[^0-9\.]/g');
}else if($(this).val()>500){
$(this.val('500');
}else if($(this).val()<0){
$(this.val('0');
}
});
$('#minDistance').blur(函数(){
if($(this.val()>$('#maxDistance').val()){
$(this.val('0');
}
});
函数发送形式(e){
e、 预防默认值();
var formData=new formData();
append('percentageOfMessages',$('#percentageOfMessages').val();
if($('RemoveDeletedAccounts').prop('checked')){
formData.append('RemoveDeletedAccounts',“1”);
}否则{
formData.append('RemoveDeletedAccounts',“0”);
}
if($('RemoveNoReply').prop('checked')){
formData.append('RemoveNoReply',“1”);
}否则{
append('RemoveNoReply',“0”);
}
if($('RemovenoreResponse').prop('checked')){
formData.append('RemoveNoResponse',“1”);
}否则{
formData.append('removenorresponse',“0”);
}
append('minMatchPercent',$('#minMatchPercent').val());
//其他东西
$.ajax({
键入:“POST”,
xhr:function(){//自定义XMLHttpRequest
var myXhr=$.ajaxSettings.xhr();
if(myXhr.upload){//检查upload属性是否存在
//myXhr.upload.addEventListener('progress',progressHandlingFunction,false);//用于处理上载的进度
}
返回myXhr;
},
cache:false,
processData:false,
contentType:false,
数据:formData,
url:'addAccounts.php',
成功:功能(数据){
控制台日志(数据);
},
错误:函数(xhr,err){
console.log(“readyState:+xhr.readyState+”\n状态:+xhr.status);
log(“responseText:+xhr.responseText”);
}
});
}
这是HTML
<div class="row uniform">
<div class="6u 12u$(xsmall)">
<input type="text" name="minDistance" id="minDistance" value="0" />
</div>
<div class="6u 12u$(xsmall)">
<input type="text" name="maxDistance" id="maxDistance" value="500" />
</div>
</div>
如果var存在且具有非空、非零值,则返回FALSE
。
否则返回TRUE
以下内容被认为是空的:
“”(空字符串)
0(0为整数)
0.0(0作为浮点)
“0”(0作为字符串)
NULL
FALSE
array()(空数组)
$var;(声明了一个变量,但没有值)
// Evaluates to true because $var is empty
if (empty($var)) {
echo '$var is either 0, empty, or not set at all';
}
// Evaluates as true because $var is set
if (isset($var)) {
echo '$var is set even though it is empty';
}
根据
0
或“0”
将被视为空,您可以使用isset()
。表单数据如何发送到服务器?@ArunPJohny我用AjaxIs console.log更新了问题,记录了数据?是的,当我打开控制台时,它说,“MindEstance”,因为如果PHPim中的值为空,我就这么说,猜测值为0
?从我在网上找到的“isset检测它是否为空。若要检查它是否为空,请使用!isset”