我正在尝试在数据库中插入新的输入行。 但显示错误（未初始化的字符串偏移量：0 in）
单行我可以插入很好，但 2 行或更多行无法插入，因为出现错误。
我搜索了很多，但没有找到完美的解决方案。请查看我的代码并给我建议。谢谢
我的 html 代码如下：-
<div id="addhere">
<tr>
<td><input type="text" class="form-control item_id" value="" readonly="" name="item_id[]"></td>
<td><textarea class="form-control item_name" name="item_name[]" rows="3"></textarea> </td>
<td><input type="text" class="form-control item_qty" value="" name="item_qty[]"></td>
<td><input type="text" class="form-control item_price" name="item_price[]" value="" style="width: 89px;"></td>
<td> <select class="form-control item_taxed" name="item_taxed[]">
<option value="Yes">Yes</option> <option value="No" selected="">No</option></select></td>
<td> <select class="form-control item_status" name="item_status[]" style="width: 89px;">
<option value="Paid">Paid</option> <option value="Not Paid" selected="">No Paid</option></select></td>
<td><input type="text" name="datepicker[]" class="date1" placeholder="Enter date" class="mycalendar" class="form-control item_price" value="" style="width: 84px;"></td>
<td><input type="text" name="departing[]" class="date2" placeholder="Enter date" class="mycalendar" class="form-control" style="width: 84px;"></td>
</tr>
</div>
对于下面的新表单行Javascript函数：-
$('#blank-add').on('click', function(){
$("#invoice_items").find('tbody')
.append(
'<tr> <td><input type="text" class="form-control item_id" value="" readonly="" name="item_id"></td> <td><textarea class="form-control item_name" name="item_name" rows="3"></textarea></td> <td><input type="text" class="form-control qty" value="" name="item_qty"></td> <td><input type="text" class="form-control item_price" name="item_price" value=""></td><td> <select class="form-control item_taxed" name="item_taxed"> <option value="Yes">Yes</option> <option value="No" selected>No</option></select></td><td> <select class="form-control item_status" name="item_status" style="width: 89px;"><option value="Paid">Paid</option> <option value="Not Paid" selected="">No Paid</option></select></td><td><input type="text" name="datepicker" class="date1" placeholder="Enter date" class="mycalendar" class="form-control item_price" value="" style="width: 84px;"></td><td><input type="text" name="departing" class="date2" placeholder="Enter date" class="mycalendar" class="form-control" style="width: 84px;"></td></tr>'
);
});
和我的PHP代码如下：-
<?php
// inserting invoice data into database name "billing"
if(isset($_POST['_dec_point'])){
for ( $row = 0; $row < count( $_POST['item_id'] ); ++$row ) {
$item_id = $_POST['item_id'][$row];
$item_name = $_POST['item_name'][$row];
$item_qty = $_POST['item_qty'][$row];
$item_price = $_POST['item_price'][$row];
$item_taxed = $_POST['item_taxed'][$row];
$item_status = $_POST['item_status'][$row];
$invoice_date = date('Y-m-d', strtotime($_POST['datepicker']))[$row];
$due_date = date('Y-m-d', strtotime($_POST['departing']))[$row];
$item_notes = $_POST['item_notes'][$row];
$client_name = $_POST['client_name'][$row];
$client_email = $_POST['client_email'][$row];
$client_phone = $_POST['client_phone'][$row];
$client_company = $_POST['client_company'][$row];
$client_address = $_POST['client_address'][$row];
$client_city = $_POST['client_city'][$row];
$client_state = $_POST['client_state'][$row];
$client_pin = $_POST['client_pin'][$row];
$client_country = $_POST['client_country'][$row];
$query = "insert into billing
(item_id,item_name,item_qty,item_price,
item_taxed,item_status,invoice_date,due_date,
item_notes,client_name,client_email,
client_phone,client_company,
client_address,client_city,
client_state, client_pin,
client_country)
values ('$item_id','$item_name','$item_qty',
'$item_price','$item_taxed','$item_status',
'$invoice_date','$due_date','$item_notes',
'$client_name','$client_email',
'$client_phone','$client_company',
'$client_address','$client_city',
'$client_state','$client_pin',
'$client_country')";
}
$run_insert = mysqli_query($con,$query);
if($run_insert){
$last_id = mysqli_insert_id($con);
echo "<script>alert('Submission Successful!')</script>";
echo "<script>window.open('invoices_view.php?view=$last_id','_self')</script>";
}
}
?>
如果你采用一个好的缩进方案，像这样的简单问题将变得几乎显而易见。
在执行查询之前，您已经终止了for循环，因此您只会更新最后一行
您还在使用它之前使用$row递增++$row，amybe 这应该是之后$row++增量。
<?php
// inserting invoice data into database name "billing"
if(isset($_POST['_dec_point'])){
/*
Not sure why you are using ++$row rather than $row++
That also may explain why you are loosing the first
update out of 2.
*/
for ( $row = 0; $row < count( $_POST['item_id'] ); ++$row ) {
$item_id = $_POST['item_id'][$row];
$item_name = $_POST['item_name'][$row];
$item_qty = $_POST['item_qty'][$row];
$item_price = $_POST['item_price'][$row];
$item_taxed = $_POST['item_taxed'][$row];
$item_status = $_POST['item_status'][$row];
$invoice_date = date('Y-m-d', strtotime($_POST['datepicker']))[$row];
$due_date = date('Y-m-d', strtotime($_POST['departing']))[$row];
$item_notes = $_POST['item_notes'][$row];
$client_name = $_POST['client_name'][$row];
$client_email = $_POST['client_email'][$row];
$client_phone = $_POST['client_phone'][$row];
$client_company = $_POST['client_company'][$row];
$client_address = $_POST['client_address'][$row];
$client_city = $_POST['client_city'][$row];
$client_state = $_POST['client_state'][$row];
$client_pin = $_POST['client_pin'][$row];
$client_country = $_POST['client_country'][$row];
$query = "insert into billing
(item_id,item_name,item_qty,item_price,
item_taxed,item_status,invoice_date,due_date,
item_notes,client_name,client_email,
client_phone,client_company,
client_address,client_city,
client_state, client_pin,
client_country)
values ('$item_id','$item_name','$item_qty',
'$item_price','$item_taxed','$item_status',
'$invoice_date','$due_date','$item_notes',
'$client_name','$client_email',
'$client_phone','$client_company',
'$client_address','$client_city',
'$client_state','$client_pin',
'$client_country')";
// } // endfor <-- comment this and add the one below
$run_insert = mysqli_query($con,$query);
/*
This code makes little sence here if you are
going to update more than one billing at a time
*/
if($run_insert){
$last_id = mysqli_insert_id($con);
echo "<script>alert('Submission Successful!')</script>";
echo "<script>window.open('invoices_view.php?view=$last_id','_self')</script>";
} // endif
} // endfor <-- move the endfor to here
}
?>
我还必须假设您向我们展示的这段代码在您的实际页面上重复了不止一次。
<div id="addhere">
<tr>
<td><input type="text" class="form-control item_id" value="" readonly="" name="item_id[]"></td>
<td><textarea class="form-control item_name" name="item_name[]" rows="3"></textarea> </td>
<td><input type="text" class="form-control item_qty" value="" name="item_qty[]"></td>
<td><input type="text" class="form-control item_price" name="item_price[]" value="" style="width: 89px;"></td>
<td> <select class="form-control item_taxed" name="item_taxed[]">
<option value="Yes">Yes</option> <option value="No" selected="">No</option></select></td>
<td> <select class="form-control item_status" name="item_status[]" style="width: 89px;">
<option value="Paid">Paid</option> <option value="Not Paid" selected="">No Paid</option></select></td>
<td><input type="text" name="datepicker[]" class="date1" placeholder="Enter date" class="mycalendar" class="form-control item_price" value="" style="width: 84px;"></td>
<td><input type="text" name="departing[]" class="date2" placeholder="Enter date" class="mycalendar" class="form-control" style="width: 84px;"></td>
</tr>
</div>
还有在表中创建新行的 javascript 方法。我是否可以建议您查看克隆最后一行，然后清除所有输入字段。这样你就不必维护一段单独的 HTML 来定义该行的内容，当行更改并且您忘记修改该段 JS 时，这最终会绊倒您或其他人。这里的例子
事实上，事实正是如此！
我只是仔细观察了确切的javascript代码，那里还有另一个问题。输入字段命名不正确
它们的名称后都没有数组指示符[]，因此当您使用 JS 向表中添加新行时，所有这些字段只能出现 1 次。所以现在考虑克隆方法！