未设置值时删除输入

Question

我得到一个列表，其中PHP从mySQL创建<input type="text" readonly value="' . $row[$item] . '">';。有时数据库表中的字段为空，所以输入看起来像这样：<input type="text" readonly value>';因此是的一个值标记，但没有任何值。 我试图做的只是删除空的输入。 我尝试使用此代码：

function clearEmpty(){ 
    var input = $('.plannerlist input').val(); 
    if(input < 0){ 
    $('.plannerlist input').remove(); 
    }  
} 

.plannerlist是以下列表：

<ul class="plannerlist" id="plannerlist1"> 
    <input type="text" readonly value="Some value here"> 
    <input type="text" readonly value> 
    <input type="text" readonly value="or no value like above"> 
    <input type="text" readonly value> 
</ul> 

我上面写的功能不工作。没有输入被删除，没有控制台错误，没有任何... 什么可能是问题？

那是我的PHP（我知道这是一个烂摊子，但它的工作原理;））：

<?php 
$host = "********"; 
$user = "********"; 
$pass = "********"; 
$db_name = "********"; 

//create connection 
$connection = mysqli_connect($host, $user, $pass, $db_name); 

//test if connection failed 
if(mysqli_connect_errno()){ 
die("connection failed: " 
. mysqli_connect_error() 
. " (" . mysqli_connect_errno() 
. ")"); 
} 
echo '<div id="content"> 
<form action="save.php" method="post"> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist1">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT FR_PM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 

</section> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist2">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT SA_AM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 
</section> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist3">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT SA_PM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 
</section> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist4">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT SO_AM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 
</section> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist5">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT SO_PM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 
</section> 
<section class="tabcontent"> 
<ul class="plannerlist" id="plannerlist6">'; 
//get results from database 
$result = mysqli_query($connection,"SELECT MO_AM FROM anmeldungen"); 
$all_property = array(); //declare an array for saving property 

//showing property 
while ($property = mysqli_fetch_field($result)) { 
array_push($all_property, $property->name); //save those to array 
} 
echo '</tr>'; //end tr tag 

//showing all data 
while ($row = mysqli_fetch_array($result)) { 
foreach ($all_property as $item) { 
echo '<input type="text" readonly value="' . $row[$item] . '">'; //get items using property value 
} 
} 
echo '</ul> 
</section> 
<input name="plannersubmit" id="plannersubmit" type="submit"> 
</form> 
</div>'; 

?> 

Answer 1

//在你的PHP foreach中你可以这样做吗？

foreach ($all_property as $item) { 
if($row[$item] != NULL || $row[$item] != '') 
{ 
    echo '<input type="text" readonly value="' . $row[$item] . '">'; 
} 

}

Answer 2

$('.plannerlist input')返回输入数组。

您需要遍历它并找到val() == ''的元素。

var inputs = $('.plannerlist input'); 
for (var i = 0; i < inputs.length; i++) { 
    var input = inputs[i]; 
    if ($(input).val() == '') { 
     $(input).remove(); 
    } 
}