I am trying to save image file through signature pad. I want the name of the file to be an element from my div. Which changes accordingly. Here is my code. It is saving the image but the filename is blank(.png).
Javascript:
$("#btnSaveSign").click(function(e){
html2canvas([document.getElementById('sign-pad')], {
onrendered: function (canvas) {
var canvas_img_data = canvas.toDataURL('image/png');
var img_data = canvas_img_data.replace(/^data:image\/(png|jpg);base64,/, "");
var p = document.getElementById('my_class').innerHtml;
//ajax call to save image inside folder
$.ajax({
url: 'save_sign.php',
data: [{ img_data:img_data, p:p}],
type: 'post',
dataType: 'json',
success: function (response) {
window.location.reload();
}
});
}
});
});
save_sign.php:
<?php
$result = array();
$imagedata = base64_decode($_POST['img_data']);
$filename = $_POST['p'];
//Location to where you want to created sign image
$file_name = './doc_signs/'.$filename.'.png';
file_put_contents($file_name,$imagedata);
$result['status'] = 1;
$result['file_name'] = $file_name;
echo json_encode($result);
?>
Replace with your assignment with var p = document.getElementById('my_class').value;
Due to onrendered function is a callback, it may not get the document.getElementById('my_class').innerHtml properly. Please get echo out the $_POST['p'] to make sure proper filename is sent to PHP side.
get document.getElementById('my_class').innerHtml before call html2canvas function.
$("#btnSaveSign").click(function(e){
var p = document.getElementById('my_class').innerText;
html2canvas([document.getElementById('sign-pad')], {
onrendered: function (canvas) {
var canvas_img_data = canvas.toDataURL('image/png');
var img_data = canvas_img_data.replace(/^data:image\/(png|jpg);base64,/, "");
// ajax call to save image inside folder
$.ajax({
url: 'save_sign.php',
data: [{ img_data:img_data, p:p}],
type: 'post',
dataType: 'json',
success: function (response) {
window.location.reload();
}
});
}
});
});
$("#btnSaveSign").click(function(e){
var p = document.getElementById('my_class').innerText;
html2canvas([document.getElementById('sign-pad')], {
onrendered: function (canvas) {
var canvas_img_data = canvas.toDataURL('image/png');
var img_data = canvas_img_data.replace(/^data:image\/(png|jpg);base64,/, "");
// ajax call to save image inside folder
$.ajax({
url: 'save_sign.php',
data: [{ img_data:img_data, p:document.getElementById('my_class').innerText}],
type: 'post',
dataType: 'json',
success: function (response) {
window.location.reload();
}
});
}
});
});
Related
I am trying to convert .HEIC image to .JPG using libheif.
libheif converts image on client side browser window only. So in order to save the image i converted image to base64 and then performed ajax to save the image using file_put_contents.
this.canvas.toBlob(function(blob) {
var extension = FILE_EXTENSIONS[blob.type] || ".bin";
var basename = this.filename.replace(/\.[^/.]+$/, "");
if (navigator.msSaveOrOpenBlob) {
navigator.msSaveOrOpenBlob(blob, basename + extension);
return;
}
var readers = new FileReader();
var base64image;
readers.readAsDataURL(blob);
readers.onload = function () {
var base64image = readers.result; // data <-- in this var you have the file data in Base64 format
// console.log(base64image);
// call ajax
var formData = new FormData();
formData.append('filename', basename);
formData.append('avatar', readers.result);
$.ajax('upload.php', {
method: "POST",
data: formData,
processData: false,
contentType: false,
success: function (response) {
console.log(response);
},
error: function () {
}
});
};
return;
// this.downloads.appendChild(dlink);
// dlink.click();
// URL.revokeObjectURL(url);
}.bind(this), format);
When i convert a single image then it works fine. But if i try to convert in loop it does not works.
Before completing js conversion, my php loop runs (I think this is the issue) So i tried php function sleep() and js set timeout(), But unfortunately none worked.
(function() {
var demo = new HeifDemo(libheif);
<?php $img_array = array('demo/1.heic', 'demo/2.heic', 'demo/3.heic');
foreach ($img_array as $img) : ?>
function saveImage(subject, callback) {
demo.loadUrl(subject);
callback();
}
saveImage('<?php echo $img; ?>', function() {
// demo.saveImage();
setTimeout( function(){
demo.saveImage();
}, 2500 );
});
//});
<?php sleep(4); endforeach; ?> }).call();
I have this html:
<div class="d-inline-flex">
<img id="reloadIMG" class="p-3 mt-5 imgP" onDragStart="return false" <?php echo htmlentities($avatar, \ENT_QUOTES, 'UTF-8', false); ?>>
<input type="file" id="uploadAvatar" name="uploadedAvatar">
</div>
the value of $avatar:
$pathFolderAvatar = 'user/'.$folder.'/avatar/*';
$imgUserPastaAvatar = glob($pathFolderAvatar)[0] ?? NULL;
if(file_exists($imgUserPastaAvatar)){
$avatar = 'src='.$siteURL.'/'.$imgUserPastaAvatar;
}else{
$avatar = 'src='.$siteURL.'/img/avatar/'.$imgPF.'.jpg';
}
and the script to send a ajax call to my file that process the file upload request:
$(function () {
var form;
$('#uploadAvatar').change(function (event) {
form = new FormData();
form.append('uploadedAvatar', event.target.files[0]);
});
$("#uploadAvatar").change(function() {
$("#loadingIMG").show();
var imgEditATTR = $("div.imgP").next().attr("src");
var imgEdit = $("div.imgP").next();
$.ajax({
url: 'http://example/test/profileForm.php',
data: form,
processData: false,
contentType: false,
type: 'POST',
success: function (data) {
$("#loadingIMG").hide();
$(imgEdit).attr('src', imgEditATTR + '?' + new Date().getTime());
}
});
});
});
i tried to force the browser to reload the img on success ajax call $(imgEdit).attr('src', imgEditATTR + '?' + new Date().getTime()); but the selector from the var imgEdit and imgEditATTR is not working:
console.log(imgEdit); result: w.fn.init [prevObject: w.fn.init(0)]
console.log(imgEdit); result: undefined;
Why is it happening, and how to fix?
I know that there's a bunch of questions about reload img, but on these questions there's not a method to reload a image without knowing the file name. I checked so many questions and this is what the answears say:
d = new Date();
$("#myimg").attr("src", "/myimg.jpg?"+d.getTime());
On my case i don't know the file name, because it's generated randomly on profileForm.php with mt_rand():
$ext = explode('.',$_FILES['uploadedIMG']['name']);
$extension = $ext[1];
$newname = mt_rand(10000, 10000000);
$folderPFFetchFILE = $folderPFFetch.'avatar/'.$newname.'_'.time().'.'.$extension;
//example of the result: 9081341_1546973622.jpg
move_uploaded_file($_FILES['uploadedAvatar']['tmp_name'], $folderPFFetchFILE);
You can return file name in response to your AJAX request and use it in success block to update src attribute of img tag
So your profileForm.php will look something like
$ext = explode('.',$_FILES['uploadedIMG']['name']);
$extension = $ext[1];
$newname = mt_rand(10000, 10000000).'_'.time();
$folderPFFetchFILE = $folderPFFetch.'avatar/'.$newname.'.'.$extension;
//example of the result: 9081341_1546973622.jpg
move_uploaded_file($_FILES['uploadedAvatar']['tmp_name'], $folderPFFetchFILE);
echo $newname // you can also send a JSON object here
// this can be either echo or return depending on how you call the function
and your AJAX code will look like
$.ajax({
url: 'http://example/test/profileForm.php',
data: form,
processData: false,
contentType: false,
type: 'POST',
success: function (data) {
$("#loadingIMG").hide();
$(imgEdit).attr('src', data);
}
});
Let profileForm.php return the generated filename:
$ext = explode('.',$_FILES['uploadedIMG']['name']);
$extension = $ext[1];
$newname = mt_rand(10000, 10000000);
$folderPFFetchFILE = $folderPFFetch.'avatar/'.$newname.'_'.time().'.'.$extension;
move_uploaded_file($_FILES['uploadedAvatar']['tmp_name'], $folderPFFetchFILE);
echo json_encode(['filename' => $folderPFFetchFILE]);
Then in the callback of your POST request:
success: function (data) {
$("#loadingIMG").hide();
$(imgEdit).attr('src', data.filename);
}
My script code like :
function changePrice(id) {
var url = '<?php echo $base_url ?>home/getprice/';
$.ajax({
url: url,
type: 'post',
data: 'id='+id,
success: function(msg) {
alert(msg);
/*
"regular_price": "800",
"discount_price": 720
*/
}
});
}
I want to both regular price and discount price on separate variable.How??
If you are getting the response as "regular_price": "800", "discount_price": 720 then make it valid JSON, parse it and get the properties.
var obj = JSON.parse('{' + msg + '}');
// valid json -^-----------^-
// get object properties
var regular = data.regular_price;
var discount = data.discount_price;
UPDATE : If response data is valid JSON format then set dataType: 'json' option.
$.ajax({
url: url,
type: 'post',
data: 'id='+id,
// set response datatype as json
dataType:'json',
success: function(msg) {
// get properties
var regular = msg.regular_price;
var discount = msg.discount_price;
}
});
Or parse it directly if the response is a string.
$.ajax({
url: url,
type: 'post',
data: 'id='+id,
success: function(msg) {
// parse the string
var data = JSON.parse(msg);
// get properties
var regular = data.regular_price;
var discount = data.discount_price;
}
});
Thanx to all..Here are the solution :
<script>
function changePrice(id)
{
var url = '<?php echo $base_url ?>home/getprice/';
$.ajax({
url:url,
type:'post',
data:'id='+id,
dataType:'json',
success:function(msg)
{
var regular = msg.regular_price;
var discount = msg.discount_price;
}
});
}
</script>
My Function :
$new = array (
"regular_price" => $result->price,
"discount_price" => $price
);
$newarray = json_encode($new, JSON_PRETTY_PRINT);
print_r($newarray);
Try this:
In server side ajax call:
$respose['regular_price'] = 120;
$respose['discount_price'] = 100;
echo json_encode($response);
In JS: Considering msg is an json object
var data = JSON.parse(msg);
var regular = data.regular_price;
var discount = data.discount_price;
I am using CI 3.0.1 was uploading and inserting image to db successfully before i used ajax, i guess trying to do it with ajax i'm missing something which isn't even sending data to upload maybe because we have to use multipart() in form while in ajax we are just sending data direct to controller, another thing i don't know how to receive the variable in response
my Ajax request function is:
<script type="text/javascript">
$(document).ready(function() {
alert("thirddddddddd");
$('#btnsubmit').click(function()
{
alert("i got submitted");
event.preventDefault();
var userfile = $("input#pfile").val();
alert("uploading");
$.ajax({
url: '<?php echo base_url(); ?>upload/do_upload', //how to receive var here ?
type: 'POST',
cache: false,
data: {userfile: userfile},
success: function(data) {
alert(data);
$('.img_pre').attr('src', "<?php echo base_url().'uploads/' ?>");
$('.dltbtn').hide();
},
error: function(data)
{
console.log("error");
console.log(data);
alert("Error :"+data);
}
});
});
});
And my controller Upload's function do_upload is:
public function do_upload()
{
$config['upload_path'] = './uploads/'; #$this->config->item('base_url').
$config['allowed_types'] = 'gif|jpg|png|jpeg';
$this->upload->initialize($config);
if ( ! $this->upload->do_upload('userfile'))
{
$error = array('error' => $this->upload->display_errors());
$this->load->view('layouts/header');
$this->load->view('home_page', $error);
$this->load->view('layouts/footer');
}
else
{
$data = array('upload_data' => $this->upload->data());
$imagedata = $this->input->post('uerfile');
$session_data = $this->session->userdata('logged_in');
$id = $session_data['id'];
$result = $this->model_edit->update_dp($id, $imagedata);
$image_name = $result->images;
$this->session->set_userdata('image', $image_name);
echo json_encode($name = array('image' => $image_name));
// $image_name = $this->upload->data('file_name');
// $data = array('upload_data' => $this->upload->data());
// redirect("account");
}
}
Now image is not even going to uploads folder, if any other file is needed tell me i'll post it here. Thanks
You cannot send file data using $("input#pfile").val();
var len = $("#pfile").files.length;
var file = new Array();
var formdata = new FormData();
for(i=0;i<len;i++)
{
file[i] = $("input#pfile").files[i];
formdata.append("file"+i, file[i]);
}
and send formdata as data from ajax
Hope it helps !
Try with the below ajax code
var formData = new FormData($('#formid'));
$.ajax({
url: '<?php echo base_url(); ?>upload/do_upload',
data: formData ,
cache: false,
contentType: false,
processData: false,
type: 'POST',
success: function(data){
alert(data);
}
});
The file contents may not send through ajax as per your code. Try with the attributes mentioned in above code.
Hi I'm new to this javavascript/ajax. I am trying to create a dropdown that dynamically changes the images by the different options as shown in this Fiddle here but the change function does not seem to be working.
I made sure that I am able to get the data from pictureList but the image source did not change successfully as the fiddle.
$('#selectVariant').change(function () {
var sku = $('#selectVariant :selected').val();
var sessionId="<?php echo $sessionId; ?>";
var dataString='sku='+ sku +'&sessionId='+sessionId;
$.ajax({
type:"post",
url: "<?php echo $base_url; ?>ajax-helper/search_variant.php",
data:dataString,
cache:false,
dataType: "JSON",
success: function(data){
var pictureList = {};
//example of my data list
//var pictureList = {'Apple SKU2': "http://tos-staging-web-server-s3.s3.amazonaws.com/9/catalogue/apples_in_season.png",
//'Pear1': "http://tos-staging-web-server-s3.s3.amazonaws.com/9/catalogue/pears.png"
//};
$.each(data.productVariantImages,function(i, productVariantImages){
pictureList[data.sku] = this.imagePath;
});
console.log(pictureList);
$('.content img').attr({"src":[pictureList[this.value]]});
}
});
return false;
});
However, when I do test it outside the ajax post, it is able to run.
Instance of this is change in ajax success function scope.
In this line $('.content img').attr({"src":[pictureList[this.value]]}); this
is not the instance of selectVariant element.
The usual practice for this is declare a variable that and use that variable in other scope. try the below code.
$('#selectVariant').change(function () {
var sku = $('#selectVariant :selected').val();
var sessionId="<?php echo $sessionId; ?>";
var dataString='sku='+ sku +'&sessionId='+sessionId;
var that = this;
$.ajax({
type:"post",
url: "<?php echo $base_url; ?>ajax-helper/search_variant.php",
data:dataString,
cache:false,
dataType: "JSON",
success: function(data){
var pictureList = {};
//example of my data list
//var pictureList = {'Apple SKU2': "http://tos-staging-web-server-s3.s3.amazonaws.com/9/catalogue/apples_in_season.png",
//'Pear1': "http://tos-staging-web-server-s3.s3.amazonaws.com/9/catalogue/pears.png"
//};
$.each(data.productVariantImages,function(i, productVariantImages){
pictureList[data.sku] = this.imagePath;
});
console.log(pictureList);
$('.content img').attr({"src":[pictureList[that.value]]});
}
});
return false;
});