Develop Reference

How to execute generate CSV File in php?

I want to generate a csv file with a dynamic filename which came from the values I got using an ajax jquery request. These values will be used as filename for my generated csv file. My program does not generate the csv file. What should I do for the csv file to be generated?
I am a newbie when it comes to php and especially AJAX and Jquery so I am still a bit confused on how an AJAX request works.
I'm using a free trial version of Sublime IDE and localhost for php. The program displays the contents of the csv file through an alert box but it doesn't generate a csv file.
This is my jquery ajax request file:
var selectedLanguage = $('#selectLanguage').val();
var length;
length = selectedLanguage.length;
for (var i = 0; i < length; i++)
{
var selectedLanguage = $('#selectLanguage').val();
$.ajax({
crossDomain: true,
async: false,
url: "downloadFile.php",
type: "GET",
data: {"seLang": selectedLanguage[i]},
success: function(data)
{
alert(data);
location.reload();
}
});
}
This is my downloadFile.php code:
<?php
$id="";
if(isset($_GET['seLang'])){
$id = $_GET['seLang'];
$filename = "File_".$id.".csv";
$f = fopen('php://memory', 'w');
//set headers for column
$fields = array('Content1', 'Content2', 'Content3','Content4');
fputcsv($f, $fields, ',');
fseek($f, 0);
header('Content-Encoding: UTF-8');
header('Content-type: text/csv; charset=UTF-8');
header('Content-Disposition: attachment; filename="' . $filename . '";');
fpassthru($f);
}
else
{
echo "<script type='text/javascript'>alert('Empty');</script>";
}
?>
Edit 1:
Thank you Prvn and Sunday Johnson for trying to help. Although, I've found the actual problem. I've read from another post in this site that it is isn't possible to download the generated csv file using AJAX. What else can I do for me to download a csv file?

header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="sample.csv"');
$fields = array('Content1', 'Content2', 'Content3','Content4');
$fp = fopen('php://output', 'wb');
foreach ( $fields as $line ) {
$val = explode(",", $line);
fputcsv($fp, $val);
}
fclose($fp);
Output

One comment about the Ajax code, why are you iterating over the value?
About the php code, use this instead:
<?php
$id="";
if(isset($_GET['seLang'])){
$id = $_GET['seLang'];
$filename = "File_".$id.".csv";
$f = fopen($filename, 'w');
//set headers for column
$fields = array('Content1', 'Content2', 'Content3','Content4');
fputcsv($f, $fields, ',');
fclose($f);
}
else
{
echo "<script type='text/javascript'>alert('Empty');</script>";
}
?>

Trying to download file from remote server using Ajax with Codeigniter not working

I am trying to download a pdf when clicking on a link.
I called function onlick of a link and in Codeigniter i wrote a function to download PDF file but when running URL ,file is downloaded but when triggered using click of link, its not working.
Controller:
function downloadpdf($pid)
{ set_time_limit(0);
$url="http://www.malayatourism.com/uploads/images/packages/pdf/$pid.pdf";
$file = basename($url);
$fp = fopen($file, 'w');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FILE, $fp);
$data = curl_exec($ch);
curl_close($ch);
fclose($fp);
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
echo "success";
}
My code ajax:
function DownLoadPdf(id)
{
url = "<?php echo base_url();?>admin/packages/downloadpdf/"+id;
$.ajax({
type:'POST',
url: url,
data : { pid : id},
success : function(response) {
console.log(response);
},
error : function(response) {
console.log("error");
}
});
}
View:
echo ' Download Attachment';

As far as ajax is concerned you cannot do that via ajax because ajax is not made for this purpose,its an asynchronous call that will give you a result. But you can do this without using any jquery, ajax at all
<a href="http://www.malayatourism.com/uploads/images/packages/pdf/$pid.pdf" download> Download Attachment</a>
Where $pid is the id you want to download the file. The download attribute will force the file to download. Cheers

Call file php by ajax to download a file

I have one PHP file and other JavaScript. In JavaScript, I pass the variable with location of place where the file exists but on the PHP side doesn't recognize and doesn't properly download the file.
Code of JavaScript:
var nameFile = oEvent.getParameters().listItem.getTitle();
var directory = "C:/xampp/htdocsui5launchpad/WebContent/documents/";
window.location =directory;
$.ajax({
url: 'http://localhost/ui5launchpad/WebContent/php/downloadPDF.php',
type: 'POST',
datatype: "json",
data: { album: nameFile },
success: function (response, data, xhr) {
window.location = 'http://localhost/ui5launchpad/WebContent/php/downloadPDF.php';
},
error: function (response) {
console.log("Error in PHP, downloadPDF.php ");
}
});
PHP code:
if(isset($_POST["album"])){
$name = $_POST["album"];
}
$dir = "C:/xampp/htdocs/ui5launchpad/WebContent/documents/";
$file = $dir . $name;
if( isset($file)) {
//echo $file;
if (file_exists($file)) {
//echo $file;
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
}
Can you help me, please ?
Thanks

You don't need to use ajax to download a file. Just link the file direct to the browser.
In the link tag put the attribute like this:
<a href="http://example.com/file.pdf" download>Download</a>

Downloading file using php and ajax

I'm trying to write a script to download a file. But when I click "Download" nothing happens. I'm using Laravel for my project. This is the function:
public function downloadUserFile(){
$userid = Auth::id();
$result = $_POST['filename'];
$query = File::where('filename', $result)->where('userid', $userid)->get();
foreach($query as $queryResult){
$mimeType = $queryResult->mimetype;
$filepath = $queryResult->filePath;
$filesize = $queryResult->filesize;
if (file_exists($filepath)) {
header('Content-Description: File Transfer');
header('Content-Type: ' . $mimeType);
header('Content-Disposition: attachment; filename="'.basename($filepath).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . $filesize);
ob_clean();
flush();
readfile($filepath);
exit;
}
}
}
And the ajax:
if(key === "download") {
var classElements = document.querySelectorAll("tr.ui-selected td.filename");
var csrf = $('input[name=_token]').val();
for(var x = 0;x < classElements.length;x++){
var result;
result = classElements[x].innerHTML;
$.ajax({
async: true,
method: 'POST',
url: '../public/downloadfile',
data: { filename: result, "_token": csrf }
});
};
}
The ajax response and the PHP don't give me errors and I can't understand why nothing actually happens. What could be the problem?

Download an image with an ajax request

I have some files on my PHP server inside uploads folder. My problem is the following: I want to send a JSON asynchronous request from my client as to choose one of these files and create with this an image element as to display it in the browser.
JS code
var file_name="test.jpg";
$.ajax({
method:"POST",
dataType:"json",
url:"retrieve_photo.php",
data:{name:file_name},
success: function(data) {
var new_thumb = document.createElement("img");
document.getElementById('dragarea').appendChild(new_thumb);
...
}
})
PHP code (retrieve_photo.php):
<?php
$ds = DIRECTORY_SEPARATOR;
$storeFolder="uploads";
$file_name=$_POST[name];
$files = glob($storeFolder.$ds.$file_name);
if ( false!==$files ) {
....
}
header('Content-type: text/json');
header('Content-type: application/json');
echo json_encode($result);
?>
I do not know what to write as $result feeds data the right way. I 've tried
$result=readfile($storeFolder.$ds.$file_name);
but maybe not correctly.As to conclude I want to use data as to display an image to my browser.
Thank you

Maybe will be better do something like that?:
var image = new Image();
image.src = "blabla";
$(image).on('load', function(){
//do what you want
})
Why do you even use AJAX? Maybe i don't understand)

Since you don't use algorithm or functions in your PHP, you can do everything by Javascript / Jquery :
var img = $("<img />").attr('src', 'uploads/'+ file_name)
.on('load', function() {
if (!this.complete || typeof this.naturalWidth == "undefined") {
alert('Image not found');
} else {
$("#dragarea").append(img);
}
});

document.getElementByI('dragarea').appendChild(new_thumb);
Мaybe you mean? document.getElementById('dragarea').appendChild(new_thumb);
document.getElementById('dragarea').appendChild(new_thumb);

try this in your retrieve_photo.php
$filename = "test.jpg";
//Make sure $filename contains the appropriate path of the photo
$size = getimagesize($filename);
$file = $filename;
if ($size) {
header("Content-type:". $size['mime']);
header("Content-Length: " . filesize($file));
header("Content-Disposition: attachment; filename=$filename");
header('Content-Transfer-Encoding: base64');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-Type: application/force-download");
readfile($file);
exit;
}