我试图逐个回显最后5个插入的db行，然后通过jquery插件打印它。例如进入要插入最后一行的输入区域然后打印然后最后一行-1然后打印等。 在我的HTML中，我在我的printablearea中有这些输入
<li><input type="number" min=1 name="printmultiple" value="1" id="printmultiple"/></li>
<div id="printableArea">
<div align="center">
<h4></h4>
<h4></h4>
<input type="text" name="barcode2" id="barcode2" required readonly >
<input type="text" name="barcodecountry" id="barcodecountry" >
<input type="text" name="barcodecountry" id="barcodecountry2" >
<br>
<div id="print">
</div>
<label id="idbar">id.:</label><input type="text" name="barcodesurname" id="barcodesurname" required readonly>
<br>
<br>
<label id="pricebar">price:</label><input type="text" name="barcodename" id="barcodename" required readonly>
<input type="text" name="barcodecountry" id="barcodecountry3">
</div>
</div>
然后在我的php我插入多个值取决于输入printmultiple的值
<?php
require('config.php');
date_default_timezone_set('Europe/Athens');
include("auth.php");
$errors = array(); // array to hold validation errors
$data = array(); // array to pass back data
// validate the variables ======================================================
// if any of these variables don't exist, add an error to our $errors array
if (empty($_POST['surname']))
$errors['surname'] = 'Surname is required.';
if (empty($_POST['name']))
$errors['name'] = 'Name is required.';
// return a response ===========================================================
// if there are any errors in our errors array, return a success boolean of false
if ( ! empty($errors)) {
// if there are items in our errors array, return those errors
$data['success'] = false;
$data['errors'] = $errors;
} else {
$printmultiple = $_POST['printmultiple'];
$signintime = date("Y-m-d H:i:s");
$username = mysqli_real_escape_string($con,$_POST['username']);
$surname =mysqli_real_escape_string($con,$_REQUEST['surname']);
$name= mysqli_real_escape_string($con,$_REQUEST['name']);
$seat= mysqli_real_escape_string($con,$_POST['seat']);
$mail= mysqli_real_escape_string($con,$_POST['mail']);
$ticketprice=mysqli_real_escape_string($con,$_POST['ticketprice']);
$barcode=mysqli_real_escape_string($con,$_POST['barcode']);
$matchtype=mysqli_real_escape_string($con,$_POST['matchtype']);
$telephone= mysqli_real_escape_string($con,$_POST['telephone']);
$expdate = date('Y-m-d H:i:s', time()+36000);
$submittedby = mysqli_real_escape_string($con,$_SESSION["username"]);
$result = mysqli_query($con, "SELECT customid FROM `salonika` ORDER BY `customid` DESC LIMIT 1");
$row = mysqli_fetch_array($result);
$max=$row['customid'];
$stmt = $con->prepare("INSERT INTO salonika (surname, name, telephone,customid,seat,mail,ticketprice,barcode,expdate,submittedby,signintime) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
for ($i=0; $i<$printmultiple; $i++) {
$barcode=$barcode+1;
$seat=$seat;
$mail=$mail;
$ticketprice=$ticketprice;
$expdate=$expdate;
$submittedby=$submittedby;
$signintime=$signintime;
$max=$max+1;
$surname = $surname;
$name = $name;
$telephone = $telephone;
$stmt->bind_param('sssississss', $surname, $name, $telephone, $max,$seat,$mail,$ticketprice,$barcode,$expdate,$submittedby,$signintime);
$stmt->execute();
}
$stmt->close();
// show a message of success and provide a true success variable
$data['success'] = true;
$data['message'] = 'Success!';
}
// return all our data to an AJAX call
echo json_encode($data);
在我的js文件中我有这个
var formData = {
'surname' : $('input[name=surname]').val(),
'name' : $('input[name=name]').val(),
'telephone' : $("#telephone").val(),
'mail' : $("#mail").val(),
'barcode' : $("#barcode").val(),
'customid' : $("#customid").val(),
'ticketprice' : $("#ticketprice").val(),
'seat' : $("#seat").val()
};
// process the form
$.ajax({
type : 'POST', // define the type of HTTP verb we want to use (POST for our form)
url : 'process.php', // the url where we want to POST
data : formData,// our data object
dataType : 'json', // what type of data do we expect back from the server
encode : true
})
// using the done promise callback
.done(function(data) {
// log data to the console so we can see
console.log(data);
// here we will handle errors and validation messages
if ( ! data.success) {
if (data.errors.surname) {
$('#surname-group').addClass('has-error'); // add the error class to show red input
$('#surname-group').append('<div class="help-block">' + data.errors.surname + '</div>'); // add the actual error message under our input
}
else if (data.errors.name) {
$('#name-group').addClass('has-error'); // add the error class to show red input
$('#name-group').append('<div class="help-block">' + data.errors.name + '</div>'); // add the actual error message under our input
}
} else {
$('#printableArea').print();
// ALL GOOD! just show the success message!
$('form').append('<div class="alert alert-success">' + data.message + '</div>');
window.setTimeout(function(){location.reload()},3000);
有没有办法一个接一个地打印到打印机最后插入的行？
答案 0 :(得分：1)
在$stmt->close();之后添加以下代码，根据您在此处提出的问题，我只需构建一个查询并执行它，即可获取用户插入的最后$printmultiple行。
然后它将名为added的条目传递给您可以在jQuery响应.done函数中处理的响应。
$printmultiple = intval($printmultiple); //sanitize variable
$result = mysqli_query($con, "SELECT * FROM `salonika` ORDER BY `customid` DESC LIMIT ".$printmultiple);
$rows = mysqli_fetch_array($result);
// show a message of success and provide a true success variable
$data['success'] = true;
$data['message'] = 'Success!';
$data['added'] = $rows;
发送回jQuery的数据以JSON格式编码。
最后JS部分如下：
if ( data.success) {
//success
$.each(data.added, function (i,it){
alert(data.added[i]);
});
$('form').append('<div class="alert alert-success">' + data.message + '</div>');
}else{
//code if error
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>