So I have this code below.
<?php
$i = 1;
while($i <= 1000) {
echo "Number : $i <br />";
$i++;
}
?>
I want to add some animation while php creating these array one after another, it's like appearing text animation. Is there any way to do that?
Thanks in advance.
Any help will be much appreciated.
Could do this with JavaScript jQuery.
$(document).ready(function () {
var i = 1;
var int = setInterval(function () {
if (i < 1000) {
var $div = $("<div>Number : "+i+"</div>").hide();
$(".container").append($div);
$div.show(500);
i++;
} else {
clearInterval(int);
}
},1000);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="container">
</div>
PHP is running on the server, so you cant create an animation using it. You should to use a language which run on the client side, like javascript (or jQuery).
In this post, the user created a Ajax request. While the server is working and the client is waiting for the response, he wanted to show a 'loading spinner': How to show loading spinner in jQuery?
Related
I have a big problem to make a progress bar in AJAX. The whole page is in AJAX, inside one of the webpage is AJAX which loads a function to get some big rows from the database.
I tried to make progress bar in this script in a foreach loop a flush() method and by writing/reading to $_SESSION, but still nothing. I really tried everything I don`t know how to do this. Need only this to complete my project. Could someone help me with this?
It is anyway which script I want to load, how is the template for this progress bar to use it in GET or POST ajax, for any AJAX.
<script>
jQuery(document).ready(function($) {
$(document).on('click','#save',function () {
setTimeout(getProgress,1000);
$(this).text('Pobieram analizę...');
$.urlParam = function(name){
var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
if (results==null){
return null;
}
else{
return decodeURI(results[1]) || 0;
}
}
var id = $.urlParam('id');
var idt = $.urlParam('idt');
$.ajax({
url: "views/getresults.php?id="+id+"&idt="+idt,
success: function(data) {
$("#loadresults").append(data);
}
});
setTimeout(getProgress,3000);
return false;
});
function getProgress(){
$.ajax({
url: 'views/listen.php',
success: function(data) {
if(data<=100 && data>=0){
console.log(data);
$('#loadresults').html('<div id="progress"><div class="progress-bar" role="progressbar" style="width:'+ (data / 100)*100 +'%">'+ data + '/' +100+'</div></div>');
setTimeout(getProgress,1000);
console.log('Repeat');
} else {
$('#loadresults').text('Pobieram dane');
console.log('End');
}
}
});
}
});
</script>
and here is a getresults.php
foreach($result as $resul) {
$count++;
session_start();
$_SESSION['progress'] = $count;
$_SESSION['total'] = 100;
session_write_close();
sleep(1);
}
unset($_SESSION['progress']);
and a get progress function listen.php
<?php
session_start();
echo (!empty($_SESSION['progress']) ? $_SESSION['progress'] : '');
if (!empty($_SESSION['progress']) && $_SESSION['progress'] >= $_SESSION['total']) {
unset($_SESSION['progress']);
}
?>
Writing and reading session doesn't work because the standard behavior of PHP is to lock the session file while your main code is being executed.
Try to create a file and update the its content with the percentage done during the execution of your function. Something like:
<?php
function slowFunction() {
$file = uniqid();
file_put_contents($file, 0);
// Long while that makes your stuff
// you have to know how many loops you will make to calculate the progress
$total = 100;
$done = 0;
while($done < $total) {
$done++;
// You may want not to write to the file every time to minimize changes of being writing the file
// at the same time your ajax page is fetching it, i'll let it to you...
$progress = $done / $total;
file_put_contents($file, $progress);
}
unlink($file); // Remove your progress file
}
?>
You can't get the progress of the data download from ajax. Once you request you to the server, the next response will be only after fetching the data or when the error occurs.
The solution to you is, get the data as fractions. Such as first download the 1/10th of the data, and in the success callback, recursively call the ajax again requesting the 2/10th data. On each success callback, you could change the progress bar.
Take a look at Server Side Events or Long polling as options
I had this code inside the <div id="chtmsg"> on a page that shows a messenger...
PHP :
if($perguntas){
for($c=0;$c<count($perguntas);$c++){
$perguntas[$c]->tipo == 'F' ? $class = 'message_F' : $class = 'message_P';
$hora = substr($perguntas[$c]->hora, 0, 5);
echo "<li class=\"".$class."\"><p>".$perguntas[$c]->mensagem."</p><span>".$pergunta->databr($perguntas[$c]->data)." - ".$hora."</span></li>";
if($perguntas[$c]->tipo=='F' and $perguntas[$c]->status == 0){
$pergunta->marcaRespLida($perguntas[$c]->id);
}
}
}
It works very well. So, I wanted to load it with js to refresh all new messages only inside the div #chtmsg and then I created a file msg.php and with the <?php include("msg");?> it continues working good, but with js I needed to put the path...
HTML :
$(document).ready(function () {
setInterval(function() {
$.get(hostGlobal+'site/modulos/produto/msg.php', function (result) {
$('#chtmsg').html(result);
scTop();
});
}, 3000);
});
But its shows the error inside de div...
Notice: Undefined variable: perguntas in /Applications/XAMPP/xamppfiles/htdocs/sisconbr-sistema-novo/site/modulos/produto/msg.php on line 3
I tested other codes inside the msg.php file and works ok without variables...
Just a thought...
Your first line in PHP
if($perguntas){
Should perhaps check if defined like so
if(isset($perguntas)){
My suggestion explained in another answer here
For better code, You should preferably use:
if (isset($perguntas) && is_array($perguntas)){
I'm currently using this code on my webpage:
<?php
$url = "https://www.toontownrewritten.com/api/invasions";
$data = json_decode(file_get_contents($url));
if (!empty($data->invasions)) {
echo "<h1 style='text-align:center;margin:auto;padding:2px;font-size:16px;font-weight:bold;text-decoration:underline;padding:2px;'>Invasion Tracker</h1>";
$i = 0;
foreach($data->invasions as $title => $inv) {
print "<h3 style='text-align:center;margin:auto;'><b>District:</b> {$title}
</h3><br style='font-size:1px;'><h3 style='text-align:center;margin:auto;'><b>Cog:</b> {$inv->type}
</h3><br style='font-size:1px;'><h3 style='text-align:center;margin:auto;'><b>Progress:</b> {$inv->progress}
</h3>";
if (count(($data->invasions) > 1)) {
if (end($data->invasions) !== $inv) {
print "<hr>";
} else {
print "<br style='font-size:2px;'>";
}
}
}
} else {
echo "<h1 style='text-align:center;margin:auto;padding:2px;color:darkred;font-weight:bold;'>No invasions!</span>";
}
?>
I'm looking to make it refresh every 10 seconds via AJAX. However, I keep reading you need to make a function, but I'm not sure how I'd do that with the API? Every 10 seconds, that API is being updated, which is why I'd like this to be updated with AJAX every 10 seconds. Currently, I have it so the user has to manually refresh. Any help is appreciated!
You can simply reload the page with the method proposed here
But if you wanna have an AJAX implementation which just refereshes a part of your html nice and tidy, You gonna have to
Almost forget your PHP code
use the following code to implement the request to the url
$.ajax({
url: "https://www.toontownrewritten.com/api/invasions",
})
.done(function( data ) {
if ( console && console.log ) {
console.log( data );
}
});
Make a JS code which would convert the data got in the previous section to a readable html and show it on your page. It should be implemented in the the block where console.log(data) is.
Put that part of code in a setInterval
setInterval(function(){
//$.ajax();
}, 10000);
And be aware that you are gonna go to hell if your request doen't complete in the interval. see this .
I have a better suggestion, again it is same as using setInterval.
setInterval(function () {
if (isActive) return; // so that if any active ajax call is happening, don't go for one more ajax call
isActive = true;
try {
$.ajax("URL", params,function() { isActive = false;//successcallback }, function () {
isActive = false; // error callback
});
} catch (ex) { isActive = false;}
}, 10000);
Your problem is a failure to understand AJAX. Below is a $.post() example.
First let's make the page that you want your Client (the Browser user) to see:
viewed.php
<?php
$out = '';
// you could even do your initial query here, but don't have to
?>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>
<head>
<meta http-equiv='content-type' content='text/html;charset=utf-8' />
<style type='text/css'>
#import 'whatever.css';
</style>
<script type='text/javascript' src='//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'></script>
<script type='text/javascript' src='whatever.js'></script>
</head>
<body>
<div id='output'><?php /* if initial query took place */ echo $out; ?></div>
</body>
</html>
Now you need your JavaScript in whatever.js.
$(function(){
function getData(){
$.post('whatever.php', function(data){
// var htm = do a bunch of stuff with the data Object, creating HTML
$('#output').html(htm);
});
}
getData(); // don't need if PHP query takes place on original page load
setInterval(getData, 10000); // query every 10 seconds
});
On whatever.php:
<?php
// $assocArray = run database queries so you can create an Associative Array that can be converted to JSON
echo json_encode($assocArray);
?>
The JSON generated by PHP shows up in the data argument, back in the JavaScript that created your PHP request:
$.post('whatever.php', function(data){
The following code is supposed to make an array from pictures found in a directory that end in .png using php, then allow buttons to change the pointer on the array and allow the page to display the current picture that the pointer is on. This doesnt seem to be working at all. Am I doing this correctly?
<!DOCTYPE HTML>
<html>
<head>
<style type="text/css">
img {float:left; }
</style>
</head>
<body>
<?PHP
$pages = array ();
$dirname = "assets/pictures/";
$images = glob($dirname."*.png");
foreach($images as $image) {
$pages[] = $image;
}
?>
<?PHP
echo '<img src="'.current($pages).'" class="photo"/>';
function shownext() {
$mode = next($pages);
}
function showprev() {
$mode = prev($pages);
}
function showfirst() {
$mode = reset($pages);
}
function showlast() {
$mode = end($pages);
}
?>
first
previous
next
last
</body>
</html>
onclick will allow you to call a javascript function, while your showprev...showlast functions are all php functions. They are not available in javascript's scope.
Also, in your php code:
You are closing the loop right after $pages[] = $image, I think you intend to display (print/echo) all images.
You don't need a loop to copy $pages to $images. You can easily copy it: $pages = $images.
You should be aware that current only makes sense inside a loop and you are calling it after loop is closed.
I think though, that you are confusing server-side (i.e. php) and client-side (i.e. javascript) execution environments.
onclick , uses to trigger javascript functions.
You cant directly put your php functions on onclick="" events. Alternatively, if you want to use jQuery, you could use $.ajax to request the values on PHP. From there, after you got the image paths, manipulate the next, prev, first, last on the client side. Consider this example:
<?php
if(isset($_POST['getimages'])) {
$dirname = "assets/pictures/";
$images = glob($dirname."*.png");
// collect the images
foreach($images as $image) {
$pages[] = $image;
}
echo json_encode($pages);
exit;
}
?>
<img src="" alt="" id="images" width="200" height="200" />
<br/>
First
Previous
Next
Last
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var current_pointer = 0;
var images = [];
$.ajax({
url: 'index.php', // call the php file that will process it, i just used this in the same page
type: 'POST',
dataType: 'JSON',
data: {getimages: true},
success: function(response) {
// after a successful response from PHP
// use that data and create your own array in javascript
images = response;
$('#images').attr('src', images[current_pointer]);
}
});
// simple pointer to navigate the array you got from PHP
$('a.navigate').on('click', function(){
var current_val = $(this).attr('id');
switch(current_val) {
case 'first':
current_pointer = 0;
break;
case 'last':
current_pointer = images.length-1;
break;
case 'next':
current_pointer = (current_pointer >= images.length-1) ? images.length-1 : current_pointer+1;
break;
case 'previous':
current_pointer = (current_pointer < 0) ? 0 : current_pointer-1;
break;
}
$('#images').attr('src', images[current_pointer]);
});
});
</script>
The problem is echo '<img src="'.current($pages).'" class="photo"/>';
This will get echoed once, no matter howoften you change $pages afterwards. You also can't call PHP functions with JavaScript's onclick.
PHP will generate the page on server side! On a fully laoded page, most interaction with the user is done via JavaScript.
To achieve your desired result, you have to export the array to JavaScript and change the image src via JavaScript, a little research will help you.
Hi to all I'm beginner in java script I need to make some alert and
shown that when the page want refresh and done some work like
counter=0 or delete a file how can I do this by jquery and java script?
thank!
You can bind refresh event:
window.onbeforeunload = function () {
return 'Post job process not completed yet.';
}
Before page load/refresh:
<head>
alert("hello");
</head>
Within body:
<script>
$count= 0;
while ($count < 10 ) {
$count++;
}
alert("counter increased: " + $count + " times");
</script>