Develop Reference

Limit image upload size

I have a script for uploading images, it works fine but I would like to limit the image size to a maximum of 2 mb, I have tried a few things but without success, I am not one of the best at this so I would be very grateful for some help, follow the code
$(document).ready(function(){
$("#but_upload_w").click(function(){
var fd = new FormData();
var files = $('#file_w')[0].files;
if(files.length > 0 ){
fd.append('file',files[0]);
$.ajax({
url: 'host/profile/upload.php',
type: 'post',
data: fd,
contentType: false,
processData: false,
success: function(response){
if(response != 0){
$("#up-01").attr("value",response);
$("input").show(); // Link img
}else{
alert('failed');
}
},
});
}else{
alert("select");
}
});
});
<?php
if(isset($_FILES['file']['name'])){
$filename = $_FILES['file']['name'];
$location = "upload/".$filename;
$imageFileType = pathinfo($location,PATHINFO_EXTENSION);
$imageFileType = strtolower($imageFileType);
$temp = explode(".", $_FILES["file"]["name"]);
$newfilename = round(microtime(true)) . '.' . end($temp);
$valid_extensions = array("jpg","jpeg","png");
$response = 0;
if(in_array(strtolower($imageFileType), $valid_extensions)) {
if(move_uploaded_file($_FILES["file"]["tmp_name"], "upload/".$newfilename)){
$response = "host/profile/upload/".$newfilename;
}
}
echo $response;
exit;
}
echo 0; ?>

if(isset($_FILES['uploaded_file'])) {
$errors = array();
$maxsize = 2097152;
$acceptable = array(
'application/pdf',
'image/jpeg',
'image/jpg',
'image/gif',
'image/png'
);
if(($_FILES['uploaded_file']['size'] >= $maxsize) || ($_FILES["uploaded_file"]["size"] == 0)) {
$errors[] = 'File too large. File must be less than 2 megabytes.';
}
if(!in_array($_FILES['uploaded_file']['type'], $acceptable)) {
$errors[] = 'Invalid file type. Only PDF, JPG, GIF and PNG types are accepted.';
}
if(count($errors) === 0) {
move_uploaded_file($_FILES['uploaded_file']['tmpname'], '/store/to/location.file');
} else {
foreach($errors as $error) {
echo '<script>alert("'.$error.'");</script>';
}
die(); //Ensure no more processing is done
}
}
Look into the docs for move_uploaded_file() for more information.

i want to save or download an image from blob url or data

im doing a paste event from clipboard, it creates a blob url. Now i dont how to save or get the file. How can i save it to my computer? I think im totally wrong in getting the blob in my php. im getting it as a string then trying to save it
This is my code for creating the blob
<?php
if( isset( $_FILES['file'] ) ) {
$file_contents = file_get_contents( $_FILES['file']['tmp_name'] );
header("Content-Type: " . $_FILES['file']['type'] );
die($file_contents);
}
else {
header("HTTP/1.1 400 Bad Request");
}
print_r($_FILES);
?>
<script type="text/javascript">
document.onpaste = function (e) {
var items = e.clipboardData.items;
var files = [];
for( var i = 0, len = items.length; i < len; ++i ) {
var item = items[i];
if( item.kind === "file" ) {
submitFileForm(item.getAsFile(), "paste");
}
}
};
function submitFileForm(file, type) {
var extension = file.type.match(/\/([a-z0-9]+)/i)[1].toLowerCase();
var formData = new FormData();
formData.append('file', file, "image_file");
formData.append('extension', extension );
formData.append("mimetype", file.type );
formData.append('submission-type', type);
var xhr = new XMLHttpRequest();
xhr.responseType = "blob";
xhr.open('POST', '<?php echo basename(__FILE__); ?>');
xhr.onload = function () {
if (xhr.status == 200) {
var img = new Image();
img.src = (window.URL || window.webkitURL)
.createObjectURL( xhr.response );
document.getElementById("nye").appendChild(img);
document.getElementById("nye").style.display = "none" ;
var x = document.getElementById("image");
x.setAttribute("type", "text");
x.setAttribute("value", img.src);
document.getElementById("image").appendChild(x);
}
};
xhr.send(formData);
}
</script>
This is my code that's save to my computer, it runs but i juts recive a blank jpg file
<?php
$data = $_POST['url'];
$filePath = $uploadDir . $name;
$contents_split = explode(',', $data);
$encoded = $contents_split[count($contents_split)-1];
$decoded = "";
for ($i=0; $i < ceil(strlen($encoded)/256); $i++) {
$decoded = $decoded . base64_decode(substr($encoded,$i*256,256));
}
$fp = fopen('sample23.jpg', 'w');
fwrite($fp, $decoded);
fclose($fp);
?>
it saves but i think the file is blank.

Jquery file uploading JSON empty error

I'm following these videos (https://www.youtube.com/watch?v=Be-GSVO7PGQ&index=9&list=PLfdtiltiRHWHCzhdE0N1zmeFHlEuqxQvm) to create a jquery upload page to my website.
I get the following error on Chrome:
Uncaught SyntaxError: Unexpected end of input
And I get the following error on Firefox Firebug:
SyntaxError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data
Currently, my code looks like this:
upload.php:
<form action="upload_process.php" method="post" enctype="multipart/form-data" id="upload" class="upload">
<fieldset>
<legend><h3>Upload files</h3></legend>
<input type="file" id="file_upload" name="file_upload[]" required multiple>
<input type="submit" id="submit_upload" name="submit_upload" value="Upload">
<div class="bar">
<span class="bar-fill" id="pb"><span class="bar-fill-text" id="pt">40%</span></span>
</div>
<div id="uploads" class="uploads">
Uploaded files will appear here.
</div>
</fieldset>
</form>
<script src="js/upload.js"></script>
<script>
document.getElementById('submit_upload').addEventListener('click', function(e) {
e.preventDefault();
var f = document.getElementById('file_upload'),
pb = document.getElementById('pb'),
pt = document.getElementById('pt');
app.uploader({
files: f,
progressBar: pb,
progressText: pt,
processor: 'upload_process.php',
finished: function(data) {
console.log(data);
},
error: function() {
console.log('not working');
}
});
});
</script>
upload.js
var app = app || {};
(function(o) {
"use strict";
var ajax, getFormData, setProgress;
ajax = function(data) {
var xmlhttp = new XMLHttpRequest(), uploaded;
xmlhttp.addEventListener('readystatechange', function() {
if (this.readyState === 4) {
if (this.status === 200) {
uploaded = JSON.parse(this.response);
console.log(uploaded);
}
if (typeof o.options.finished === 'function') {
o.options.finished(uploaded);
}
} else {
if (typeof o.options.error === 'function') {
o.options.error(uploaded);
}
}
});
xmlhttp.open('post', o.options.processor);
xmlhttp.send(data);
};
getFormData = function(source) {
var data = new FormData(), i;
for(i = 0; i < source.length; i = i + 1) {
data.append('file[]', source[i]);
}
data.append('ajax', true);
};
setProgress = function(value) {
};
o.uploader = function(options) {
o.options = options;
if (o.options.files !== undefined) {
ajax(getFormData(o.options.files.files));
}
};
}(app));
and my upload_process.php
<?php
//require_once('core/init.php');
header('Content-Type: application/json');
$uploaded = [];
$allowed = ['mp4', 'png', 'bmp', 'mp3', 'txt'];
$succeeded = [];
$failed = [];
if (!empty($_FILES['file_upload'])) {
foreach($_FILES['file_upload']['name'] as $key => $name) {
if ($_FILES['file_upload']['error'][$key] === 0) {
$temp = $_FILES['file_upload']['tmp_name'][$key];
$ext = explode('.', $name);
$ext = strtolower(end($ext));
$file = md5_file($temp) . time() . '.' . $ext;
if (in_array($ext, $allowed) === true && move_uploaded_file($temp, "uploads/{$file}") === true) {
$succeeded[] = array(
'name' => $name,
'file' => $file
);
$db = new DB();
$user = new User();
$units = new Units();
$size = filesize("uploads/" . $file);
$formattedSize = $units->formatSizeUnits($size);
$db->insert('files', array(
'user_id' => $user->data()->id,
'name' => $name,
'size' => $formattedSize,
'address' => 'uploads/' . $file . '',
'created' => date('Y-m-d H:i:s'),
'type' => $ext
));
/*Redirect::to('index');
Session::flash('');*/
} else {
$failed[] = array(
'name' => $name
);
}
}
}
if (!empty($_POST['ajax'])) {
echo json_encode(array(
'succeeded' => $succeeded,
'failed' => $failed
));
}
}
I know that the problem is propably that this:
uploaded = JSON.parse(this.response);
this.response returns nothing.
I just can't figure out why it returns nothing.

Ajax send & Save Base64 encoded image to server

I am passing a base64 url through jquery ajax and want to save onto the server. But the code below is giving me a empty file. I have tried writing the decoded string and createimage from string but with both variables, 0 bites have been written. When i test the value being worked on it outputs [object FileReader]......i think either i am missing a step or making a mistake some where.
Also is there a way to convert the image to a $_FILE type object? reason being id like to using a wordpress function to save the file if possible.
Php code:
function uploadimg() {
$error = false;
//if ( ! function_exists( 'wp_handle_upload' ) ) require_once( ABSPATH . 'wp-admin/includes/file.php' );
//$upload_overrides = array( 'test_form' => false );
$images=array();
$a=0;
unset ($_POST['action']);
foreach($_POST as $basefile){
$upload_dir = wp_upload_dir();
$upload_path = str_replace( '/', DIRECTORY_SEPARATOR, $upload_dir['path'] ) . DIRECTORY_SEPARATOR;
$base64_string = $basefile;
echo $basefile;
$base64_string = preg_replace( '/data:image\/.*;base64,/', '', $base64_string );
$decoded_string= base64_decode($base64_string); // 0 bytes written in fwrite
$source = imagecreatefromstring($decoded_string); // 0 bytes written in fwrite
$output_file = $upload_path.'myfilef'.$a.'.jpg';
$images[]=$output_file;
$a++;
$image = fopen( $output_file, 'wb' );
$bytes=fwrite( $image, $source);
echo $bytes;
fclose( $image );
}
echo json_encode($images);
exit;
}
add_action('wp_ajax_uploadimg', 'uploadimg');
add_action('wp_ajax_nopriv_uploadimg', 'uploadimg');
jQuery sample code
jQuery(document).on('change', '.imageup', function(event){
errors= [];
errnum=0;
numberofimages=jQuery("#selectedimages > div").length; //get number of images
if(numberofimages<10){
var id= jQuery(this).attr('id');
var length= this.files.length;
if(length>1) {// if a multiple file upload
var images = new FormData();
images.append('action', 'uploadimg'); //wordpress specific
jQuery.each(event.target.files, function(key, value ){
var size= value.size;
var extension= value.name.substring(value.name.lastIndexOf('.') + 1).toLowerCase();
var allowedExtensions = ['png', 'jpg', 'jpeg', 'gif'];
if( allowedExtensions.indexOf(extension) !== -1 ) {
if(numberofimages<10){
var file=value;
console.log(file);
var fileReader = new FileReader();
fileReader.onload = function (e) {
var img = new Image();
img.onload = function () {
var MAX_WIDTH = 100;
var MAX_HEIGHT = 100;
var width = img.width;
var height = img.height;
if (width > height) {
if (width > MAX_WIDTH) {
height *= MAX_WIDTH / width;
width = MAX_WIDTH;
}
} else {
if (height > MAX_HEIGHT) {
width *= MAX_HEIGHT / height;
height = MAX_HEIGHT;
}
}
var canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
canvas.getContext("2d").drawImage(this, 0, 0, width, height);
this.src = canvas.toDataURL('image/png');
} // end on load function
img.src = e.target.result;
} //end filereader function
fileReader.readAsDataURL(file);
console.log(fileReader);
images.append(key, fileReader);
numberofimages++;
} else {
errnum++;
errors[errnum]= value=' is a illegal file type';
}
}
});
//image holder finished, remove
jQuery('#'+id).remove();
jQuery.ajax({
url: '/wp-admin/admin-ajax.php',
type: 'POST',
data: images,
cache: false,
processData: false,
contentType: false,
success: function(data) {
console.log(data);
}//end of success function
});

ok thanks to PaulS for pointing me in the right direction....updated jQuery below........the php up top wont work with this (im cutting out the ajax even though i have included a note below to show where it goes) the array is different as i added in the filename as well as the base64 url.
jsfiddle http://jsfiddle.net/dheffernan/6Ut59/
Basically the flow is,
1.Check max files allowed
2 & then for each file check it does not exceed it.
3 Call filereader, when loaded, call resizeBase64img (thanks to the person who submitted that)
4. if on the last file to be processed -- submit FormData via Ajax
5.When file returns input div to show image & if full remove file input
function resizeBase64Img(base64, width, height) {
var canvas = document.createElement("canvas");
canvas.width = width;
canvas.height = height;
var context = canvas.getContext("2d");
var deferred = $.Deferred();
$("<img/>").attr("src", base64).load(function() {
context.scale(width/this.width, height/this.height);
context.drawImage(this, 0, 0);
deferred.resolve($("<img/>").attr("src", canvas.toDataURL('image/jpg')));
});
return deferred.promise();
}
function readFile(file) {
var reader = new FileReader();
var deferred = $.Deferred();
reader.onload = function(event) {
deferred.resolve(event.target.result);
};
reader.onerror = function() {
deferred.reject(this);
};
if (/^image/.test(file.type)) {
reader.readAsDataURL(file);
} else {
reader.readAsText(file);
}
return deferred.promise();
}
jQuery(document).on('change', '.imageup', function(event){
var maximages=4;
var imagecount=jQuery("#imagesholder > div").length;
var length= this.files.length;
var images= new FormData;
var processKey=0;
var i=1;
jQuery.each(event.target.files, function(key, value){
// number of images control.
imagecount++;
if(imagecount > maximages) {
var full=true;
jQuery('.imageup').remove();
jQuery('#imageinput').html("Image Quota Full, Please delete some images if you wish to change them");
return;
} else if (imagecount == maximages) {
var full=true;
jQuery('.imageup').remove();
jQuery('#imageinput').html('<div class="image-box-full">Image Quota Full: delete images to change them</div>');
}
//call resize functions
var name=value;
$.when( readFile(value) ).done(function(value) {
resizeBase64Img(value, 300, 200).done(function(newImg){
images[processKey]=[];
images[processKey]['url']=newImg[0].src;
images[processKey]['name']=name.name;
processKey++;
if(length===processKey) {
//----------------INSERT AJAX TO RUN HERE SUBMITTING IMAGES (THE FORMDATA) E.G
jQuery.ajax({
url: '/wp-admin/admin-ajax.php',
type: 'POST',
data: images,
cache: false,
processData: false,
contentType: false,
success: function(data) {
console.log(data);
}
});
}
$('#imagesholder').append('<div id="delete'+i+'">'+'<div class="image-box"><div class="box-image"><img src="'+newImg[0].src+'" style="width:50px;"/></div><div class="image-box-text">'+name.name+'</div><input type="image" src="http://testserverdavideec.mx.nf/wp-content/uploads/2014/04/success_close.png" class="deletebutton" id="delete/i'+i+'"/></div> </div>');
i++;
if(full === true) {
jQuery('.image-box-full').show();
}
});
});//end when
});//end each
jQuery(this).val('');
});//end on change

Send $_POST[] and $_FILES[] in same Ajax call

I am working on an image upload post part of my site and I am struggeling to be able to upload the image with the date. I am sending the date via $_POST and the files for the images in $_FILES.
Here is my code (Javascript):
(function post_image_content() {
var input = document.getElementById("images"),
formdata = false;
function showUploadedItem (source) {
var list = document.getElementById("image-list"),
li = document.createElement("li"),
img = document.createElement("img");
img.src = source;
li.appendChild(img);
list.appendChild(li);
}
if (window.FormData) {
formdata = new FormData();
document.getElementById("btn").style.display = "none";
}
input.addEventListener("change", function (evt) {
var data = '';
date = document.getElementById('image_date').value;
if(date == ''){
alert('Please select a date!');
return 0;
} else {
data = 'date='+date;
}
document.getElementById("response").innerHTML = "Uploading . . ."
var i = 0, len = this.files.length, img, reader, file;
for ( ; i < len; i++ ) {
file = this.files[i];
if (!!file.type.match(/image.*/)) {
if ( window.FileReader ) {
reader = new FileReader();
reader.onloadend = function (e) {
showUploadedItem(e.target.result, file.fileName);
};
reader.readAsDataURL(file);
}
if (formdata) {
formdata.append("images[]", file);
}
}
}
if (formdata) {
$.ajax({
url: "submit_image.php",
type: "POST",
data: formdata + ' ' + data,
processData: false,
contentType: false,
success: function (res) {
$('#images').show();
document.getElementById("response").innerHTML = res;
hideImageUpload();
}
});
}
}, false);
}());
function hideImageUpload(){
$('#image_upload_form').hide(250);
//$('#response').hide(250);
$('#image-list').hide(250);
}
And the PHP:
<?php
require_once 'core/init.php';
$user = new User();
$errors = $_FILES["images"]["error"];
$date = $_POST['date'];
$date = explode("/", $date);
$newdate = $date[2] + '-' + $date[0] + '-' + $date[1];
foreach ($errors as $key => $error) {
if ($error == UPLOAD_ERR_OK) {
$name = $_FILES["images"]["name"][$key];
//$ext = pathinfo($name, PATHINFO_EXTENSION);
$name = explode("_", $name);
$imagename='';
foreach($name as $letter){
$imagename .= $letter;
}
move_uploaded_file( $_FILES["images"]["tmp_name"][$key], "images/uploads/" . $user->data()->id . '_' . $imagename);
$user->create('photos', array(
'osid' => $user->data()->id,
'user' => $user->data()->username,
'gallery' => 'Uploads',
'filename' => "images/uploads/" . $user->data()->id . '_' . $imagename,
'date' => $newdate
));
}
}
echo "<h2>Successfully Uploaded Images</h2>";
I am new to web development, and I am using PDO to enter into database.

Wait... data: formdata + ' ' + data, It is slightly confusing. You add FormData object and string containing url-encoded data.
Append date value to your formdata object: formdata.append('date', date). After this, send AJAX query with data: formdata, only.
But there may be more errors.
For debugging, use Chrome developer tools. You can use debugger and console.log(something) for breakpoint and printing your vars. Also, you always can use step-by-step debugging.