I have been trying to export a search result to an Excel file (type .xls), before this, I have been using purely PHP and it works.
However, my client requests to have "live search" effect, so I have to shift to AJAX.
Here is the starting point: User clicks "Export" button, and in the javascript (in the main php file viewdata.php):
<script src='https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js'></script>
....
$(document).ready(function () {
var guid = <?php echo $guid ?>;
var date = document.getElementById("cbXDate").value;
var key = document.getElementById("cbsearch").value;
console.log("GUID: '" + guid + "', Date: '" + date + "' Key: '" + key + "'");
$.post("export_contacts.php",
{ sGuid: guid, sDate: date, sKey: key },
function () { console.log("Complete"); } );
});
cbXDate is an input field of type date to let user choose a date from whence to export the data, and cbsearch is a text input field to include a search keyword. console commands are added to see where the code execution has went through.
in the export_contact.php:
<?php
echo '<script> console.log("Export PHP activated."); </script>';
?>
I removed the PHP MySQL data selection code just to debug the problem (full source code below).
Problem is: export_contacts.php is never called. The "Export PHP activated" message never popped up in the console. The console only displayed the data values and "Completed", i.e. export_contacts.php was never called.
Output:
GUID: '0001', Date: '2021-08-01' Key: 'Jo'
Complete
Out of curiosity, I replaced $.post(...) with $("#export_div").load(...) and the console message showed up:
$(document).ready(function () {
var guid = <?php echo $guid ?>;
var date = document.getElementById("cbXDate").value;
var key = document.getElementById("cbsearch").value;
console.log("GUID: '" + guid + "', Date: '" + date + "' Key: '" + key + "'");
$("#export_div").load("export_contacts.php",
{ sGuid: guid, sDate: date, sKey: key },
function () { console.log("Complete"); } );
});
Output:
GUID: '0001', Date: '2021-08-01' Key: 'Jo'
Export PHP activated.
Complete
But this is not what I want, I want to write the output to a file, not display them in a div in the webpage. However, the data shown in the "export_div" div is correct, but the header part is not running, I know the quirkyness in header() calls, but I didn't output anything before the header() calls (unless output from the calling viewdata.php file also count?), here is the full export_contacts.php source code:
<?php
include("./php/auth.php");
$guid = $_POST['sGuid'];
$date = $_POST['sDate'];
$skey = $_POST['sKey'];
$searchKey = $_POST['sKey'];
if($searchKey == "")
{
$skey = "'%'";
}
else
{
$skey = "'%".$searchKey."%'";
}
$sql = "SELECT *, FROM_UNIXTIME(ROUND((date / 1000), 0) + 46800) AS date
FROM contacts
WHERE owner = '$guid' AND contact <> ''
AND (contact LIKE $skey OR name LIKE $skey) ";
if(!empty($date))
{
"AND date >= '$date' ";
}
$sql .= "ORDER BY contact;";
if($result = mysqli_query($link, $sql))
{
$columnHeader = '';
$columnHeader = "Owner" . "\t" . "Contact" . "\t" . "Name" . "\t" . "SaveDate" . "\t";
$setData = '';
while($rows = mysqli_fetch_assoc($result))
{
$rowData = '';
foreach ($rows as $value)
{
$value = '"' . $value . '"' . "\t";
$rowData .= $value;
}
$setData .= trim($rowData) . "\n";
}
// in case of .load() used,
// code works up until this point
// code doesn't work since here...
header("Content-type: application/xls");
header("Content-Disposition: attachment; filename=contact_".$guid.".xls");
header("Pragma: no-cache");
header("Expires: 0");
echo ucwords($columnHeader) . "\n" . $setData . "\n";
// until here
// this will show in console in case of .load() used
echo '<script> console.log("Export PHP activated."); </script>';
die();
}
else
{
echo "<script>window.alert('ERROR: '".mysqli_error($link).")</script>";
}
include("./php/cleanup.php");
?>
This code is working in the pure PHP version. I don't know why this header() part isn't working in here, could be due to its output got redirected to the div?
To make things clear, my question is: "Why $.post(...) isn't calling the PHP file, while $("#export_div").load(...) did?".
The header() part is just a sub question, and is fine if it's ignored.
As Kmoser pointed out, I was doing things wrong. None of the tutorial sites I visited did mention that $.post() will not return any result at all, while my php code is expecting the return of the search result and write them in a file in the header() calls.
Related
Say I have 10 items in my db that I am trying to shuffle, how could I alter my current code so that every time it pulls a name out of the db that it shows up one at a time, rather than all at once?
$con = mysqli_connect("XXX", "XXX", "XXX", "XXX");
$query = mysqli_query($con, "SELECT * FROM users WHERE `group` = 3");
echo 'Normal results: <br>';
$array = array();
while ($row = mysqli_fetch_assoc($query)) {
$array[] = $row;
echo $row['firstname'] . ' ' . $row['lastname'] . '<br>';
}
?>
<form method="post">
<input type="submit" value="Shuffle" name="shuffle">
</form>
<?php
if (isset($_POST['shuffle'])) {
shuffle($array);
echo 'Shuffled results: <br>';
foreach ($array as $result) {
$shuffle_firstname = $result['firstname'];
$shuffle_lastname = $result['lastname'];
?>
<div id="shuffle_results">
<?php echo $shuffle_firstname . ' ' . $shuffle_lastname . '<br>';?>
</div>
<?php }
}
//What I added in and this is the spot I added it as well
$get_shuffle = array($array);
$shuffle_one = array_pop($get_shuffle);
print_r($get_shuffle);
?>
I want them all to stay put once they have shown.. I just want all of them to come out one at a time. Say, there is 10 pieces of paper in a bag and you are drawing one at a time and then put the pieces of paper on a table to show what was drawn, that is what I want.
As a follow up to my comment suggesting you use JavaScript instead of PHP for the animation, here is a basic way to do it. (This code assumes you have jQuery on the page).
Note: I haven't tested this code and there is likely a bug or two, but I hope you get the general idea.
Your HTML
<div id="shuffle_results"></div>
<form onsubmit="getData()">
<input type="submit" value="Shuffle" name="shuffle">
</form>
Your PHP
$con = mysqli_connect("localhost", "root", "", "db");
$query = mysqli_query($con, "SELECT * FROM users WHERE `group` = 3");
$array = array();
while ($row = mysqli_fetch_assoc($query)) {
array_push($array, $row);
}
header('Content-Type: application/json');
echo json_encode($array);
Your JavaScript
function getData() {
$.ajax({
url: 'url to PHP script',
dataType: 'json',
success: function(data) {
for(var i = 0, l = data.length; i < l; ++i) {
window.setTimeout(addResult, 2000, data[i].firstname, data[i].lastname);
}
},
error: function(jqXHR, textStatus, error) {
alert('Connection to script failed.\n\n' + textStatus + '\n\n' + error);
}
});
}
function addResult(firstname, lastname) {
$('#shuffle_results').append("<p>" + firstname + " " + lastname + "</p>");
}
The basic idea here is that you shouldn't use PHP to do DOM manipulation. PHP can load data into your webpage (and that data can be DOM elements, JSON data as I have shown, or other types of data), but once there JavaScript should be used to interact with it. Recall, PHP runs on your server, while JavaScript (traditionally) runs in the client's web browser.
i have a stored routine called collection_get_category_suggestions which has the following sql
select *
from album
where category=InCategory;
This should return a list of multiple records based on a category the user chooses. When run in sql tab the result of the routine returns multiple values however when executed in the routine tab and JavaScript it will only return the first record. Here is my JavaScript function which handles sql.
function getCategorySuggestions(catid)
{
var categoryid = catid;
console.log(categoryid);
selectedcategory = categoryid;
$("#suggestionsTab").empty();
var url = "categories_xml.php?category=" + selectedcategory;
$.ajax({
type: "GET",
url: url,
dataType: "xml",
success: function(xml){
var album_title = $(xml).find('album_title').text();
console.log(album_title);
var artist = $(xml).find('artist').text();
var year = $(xml).find('year').text();
var imageurl = $(xml).find('imageurl').text();
var categoryinfo = "<h3>" + album_title + "</h3><p>" + artist + " (" + year + ")</p>";
//categoryinfo += "<img src='" + imageurl + "' alt='" + album_title + " Album Cover' height='200' width='200' />";
console.log(categoryinfo);
$('#suggestionsTab').append(categoryinfo);
},
error: function() {
alert("An error occurred while processing XML file.");
}
});
}
the console.log returns one record. Why is this? Thanks very much for any help
EDIT:
php script
<?php
// Include utility files
require_once 'include/config.php';
// Load the database handler
require_once BUSINESS_DIR . 'database_handler.php';
// Load Business Tier
require_once BUSINESS_DIR . 'collection.php';
header("Content-type: text/xml");
$response='<?xml version = "1.0" ?><albums>';
if (isset($_GET['category']))
{
$obj = Collection::GetCategorySuggestions($_GET['category']);
$album_title=$obj['album_title'];
$artist=$obj['artist'];
$category=$obj['category'];
$year=$obj['release_date'];
$imageurl="./images/" . $obj['image'];
$response .= '<album><album_title>' . htmlentities($album_title, ENT_QUOTES) . '</album_title>';
$response .= '<artist>' . htmlentities($artist, ENT_QUOTES) . '</artist>';
$response .= '<category>' . htmlentities($category, ENT_QUOTES) . '</category>';
$response .= '<year>' . $year . '</year>';
$response .= '<imageurl>' . htmlentities($imageurl, ENT_QUOTES) . '</imageurl></album>';
}
$response .= '</albums>';
echo $response;
?>
i should add that the collection.php function is
public static function GetCategorySuggestions($category)
{
// Build SQL query
$sql = 'CALL collection_get_category_suggestions (:category)';
// Build the parameters array
$params = array (':category' => $category);
// Execute the query and return the results
return DatabaseHandler::GetRow($sql, $params);
}
foreach loop
foreach($albumsarray as $album)
{
$album_id=$album['album_id'];
$album_title=$album['album_title'];
$artist=$album['artist'];
$response .= '<album><album_id>' . $album_id . '</album_id><album_title>' . htmlentities($album_title, ENT_QUOTES) . '</album_title><artist>' . htmlentities($artist, ENT_QUOTES) . '</artist></album>';
}
I am writing a hybrid app using Visual Studio with Cordova exetnstion and trying to pull data from www.a.com/b.php
My b.php code is:
<?php
// Connect to database server
mysql_connect("http://www.yo.com", "ya", "ye") or die (mysql_error());
// Select database
mysql_select_db("oh") or die(mysql_error());
// SQL query
$strSQL = "SELECT * FROM Properties ORDER BY number DESC";
// Execute the query (the recordset $rs contains the result)
$rs = mysql_query($strSQL);
// Loop the recordset $rs
// Each row will be made into an array ($row) using mysql_fetch_array
echo '<select name="Address" id="address_search" style="width:282px; display:block;" required>';
while($row = mysql_fetch_array($rs))
{
// Write the value of the full address including unit code, address, city, state, zipcode (which is now in the array $row)
echo '<option value="'. $row['number'] . ", " . $row['address'] . ", " . $row['city'] . ", " . $row['state'] . ", " . $row['zipcode'] .'">'
. $row['number'] . ", " . $row['address'] . ", " . $row['city'] . ", " . $row['state'] . ", " . $row['zipcode'] .
'</option>';
}
echo '</select>';
// Close the database connection
mysql_close();?>
I already add select tag form directly in php code, but I don't know how to display the whole select box (with options being retrieved data) in .html.
Any help or tutorial? Thanks.
I have solved this issue like this:
First, in the server side-code (php in this case), in "file.php", I have an array with the database elements and I do the following:
$arrayElements = json_encode($arrayElements );
echo $_GET['jsoncallback'] . '(' . $arrayElements . ');';
After that, in the app js code, I use jQuery method $.getJSON() for getting the php array we prepare before. When the function get the server answer, then execute the code inside. Note that the variable "respuestaServer" is the array you have sent from php file, so you can go throw it with a loop and taking its values to your select (if you need to pass variables to your php file and receive them via GET just add the js variables inside the {}, in this example I send the variable datosUsuario and in php I receive it $_GET['usuario']).
var archivoValidacion = "http://example.com/file.php?jsoncallback=?";
var select = document.getElementById("idSelect");
$.getJSON( archivoValidacion, { usuario:datosUsuario ,password:datosPassword})
.done(function(respuestaServer) {
for(var i = 0; i < respuestaServer.length;i++){
var option = document.createElement("option");
var textNode = document.createTextNode(respuestaServer[i]);
option.appendChild(textNode);
select.appendChild(option);
}
})
I hope this can help you. If you have some questions just tweet me #ulisesveraes ;)
it is not clear how you call this code
I suppose you do this with jQuery ajax function
so your code will like something this
$('box-selector').load('b.php');
I would like to add an if statement regarding the 'type' column. Is there something after the .attr('type') which will allow me to specify a particular value for type?
$.get("map_process.php", function (data) {
$(data).find("marker").each(function () {
var name = $(this).attr('name');
var address = '<p>'+ $(this).attr('address') +'</p>';
var type = $(this).attr('type');
So $(this).attr('type'); is loading all the rows in my tables 'type' column value. eg:
Table
Name, Address, Type*
Name1, Address1, TypeA,
Name2, Address2, TypeB,
Name3, Address3, TypeA,
etc
How can I 'get access' to what actually the value of the 'type' column; eg. $(this).attr('type').<something>('TypeA');
Is this possible?
Edit2: map_process.php end
// Select all the rows in the markers table
$query = "SELECT * FROM markers";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
// Start XML file, echo parent node
echo '<markers>';
// Iterate through the rows, printing XML nodes for each
while ($row = #mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
echo '<marker ';
echo 'name="' . parseToXML($row['name']) . '" ';
echo 'address="' . parseToXML($row['address']) . '" ';
echo 'lat="' . $row['lat'] . '" ';
echo 'lng="' . $row['lng'] . '" ';
echo 'type="' . $row['type'] . '" ';
echo 'description="' . parseToXML($row['description']) . '" ';
echo '/>';
}
// End XML file
echo '</markers>';
?>
You have two options:
(1) If you have full control over the ajax page you are calling, the best solution would be to:
"send the selected checkbox value into map_process.php and get the
selected value from table and update the markers again in Map." –
Krish R
//jQuery
var cbVal = "TYPEA"; //Assign with checkbox value's associated string
$.get("map_process.php?checkboxval=" + cbVal, function (data)
{
//do something with the data returned
});
//PHP
$query = "SELECT * FROM markers where type = '".$_GET["checkboxval"]."'";
(2) If you don't have control over the source of the ajax call (for example from a third party source), OR you want to return all markers every time, consider using the jQuery Filter method.
//jQuery
var cbVal = "TYPEA"; //Assign with checkbox value's associated string
$(data).filter(function(index,val)
{
return $(val).attr('type') === cbVal;
}).each(function ()
{
//do something with the data returned
});
See the example for option (2) on this JSFiddle
I am using Codigniter to redo a website. I have the following controller code:
public function get_topics()
{
$topic = $this->input->post('input_data');
$topics = $this->firstcoast_model->get_topics_like($topic);
foreach ($topics as $val) {
echo "<pre id = \"pre_" . $val['id'] . "\">";
echo $val['formula'];
echo "<br />";
// generate a unique javascript file.
$f = "file_" . $val['id'] . ".js";
if (!file_exists($f));
{
$file = fopen($f,"w");
$js = "\$(\"#button_" . $val['id'] . "\").click(function(){\$(\"#pre_" . $val['id'] . "\").hide();});";
fwrite($file,$js);
fclose($file);
}
echo "<script src=\"file_" . $val['id'] . ".js\"></script>";
echo "<button id=\"button_" . $val['id'] . "\">Hide</button>";
echo "</pre>";
}
}
The basic idea to make an AJAX call to the function to retrieve a list of formulas.
The purpose of the javascript is to be able to hide any of the formulas by
hiding the <pre> </pre> tag that surrounds them The js file (i.e. file_1.js) I generate looks like:
$("#button_1").click(function(){$("#pre_1").hide();});
and the button code is:
<button id="button_1">Hide</button>
The problem is that it doesn't work. The files get generated, but clicking on the "Hide"
button does nothing. The puzzling part is that the exact same code works on the original website where I just make an AJAX call to a PHP file that generates the same code.
Any ideas what could be going on here?
Edit:
On my old website I used:
$query = "SELECT * FROM topics WHERE term LIKE '%" . $term . "%'";
$result = mysql_query($query);
while ($val = mysql_fetch_array($result))
{
echo "<pre id = \"pre_" . $val['id'] . "\">";
etc.
etc.
}
and everything works fine. If I now put the results of the while loop into to an array and then do a foreach loop on that, the results are very intermittent. I'm wondering if the foreach loop is the problem.
i think you can return list buttons in json response
public function get_topics()
{
$topic = $this->input->post('input_data');
$topics = $this->firstcoast_model->get_topics_like($topic);
$response = array('buttons' => $topics);
header('Content-Type: application/json');
echo json_encode( $arr );
}
so client can parse which button element to be hide.
<script type="text/javascript">
$(document).ready(function(){
$('somEL').on('submit', function() { // This event fires when a somEl loaded
$.ajax({
url: 'url to getTopics() controller',
type : "POST",
data: 'input_data=' + $(this).val(), // change this based on your input name
dataType: 'json', // Choosing a JSON datatype
success: function(data)
{
for (var btn in data.buttons) {
$(btn).hide();
}
}
});
return false; // prevent page from refreshing
});
});
</script>