Sorry to ask this issue as it puzzled me for a long time using Codeigniter.
Here is what I am doing.
As seen below, I am displaying a form where there is a button "Download".
This download button should download that image into PDF file where the details
are written on it (those in RED box).
So this is the process I am doing.
Create an Image on the fly (dynamic) using PHP function imagecreatefromjpeg.
Download/Copy that image generated in the URL and save it in a folder in the server
Generate a PDF using mpdf referencing to that image created dynamically.
I can now create an image dynamically like this one below. Where I can write a text into the image (see 2015 text written in the image)
My problem is, when I click the "Download" button, it should not display
the image in the browser but automatically download it in the folder on the server then it calls the function MPDF to convert it into PDF file. Is this possible?
Code:
This is the Method called when user clicked the "Download" button
public function download_pdf() {
$data['image'] = $this -> get_photo();
$this -> mpdf_convert_pdf();
}
This is the function that creates the image dynamically. Once created, it should download it in the specified folder location on the server.
function get_photo(){
//Create an Image on the Fly
header('Content-Type: image/jpg');
$imgpath = site_url() . 'assets/images/2316.jpg';
$img = #imagecreatefromjpeg($imgpath);
$white = imagecolorallocate($img, 0, 0, 0);
$font_path = 'assets/fonts/arial.ttf';
$text = "2015!";
imagettftext($img, 100, 0, 300, 300, $white, $font_path, $text);
imagejpeg($img);
imagedestroy($img);
//Copy an Image from URL into a server folder
$content = file_get_contents('http://localhost/run_ms/ccertificates/get_photo');
file_put_contents('C:\xampp\htdocs\run_ms\assets\images\thumb\Test.png', $content);
}
And here's is the part where it converts the image into PDF file.
public function mpdf_convert_pdf() {
include ('application/third_party/mpdf/mpdf.php');
$mpdf = new mPDF('c', 'Legal', '', '', 5, 5, 5, '5', '5', '0');
//Display output
$html = '<img src="C:\xampp\htdocs\run_ms\assets\images\thumb\Test.png">';
//display PDF file
$mpdf -> WriteHTML($html);
$mpdf -> Output('Converted_pdf', 'D');
exit ;
}
Thank you so much experts any inputs you may share into this query of mine.
so the point is, in every "Download" button you clicked, the pdf should open to new tab and showing the data first?
In order not to display the created image in the browser, you need to specify the path where it will be saved into your server. Since my issue before is how to download the created image and not to be displayed in the browser.
To do so, you need to specify the path on the fm imagejpeg
So instead of doing like this:
imagejpeg($img);
It should be done this way:
imagejpeg($img,'C:\xampp\htdocs\rn_ms\assets\images\thumb\test.png');
The second parameter is the path and filename where it will be saved in the server as stated in the PHP manual (http://php.net/manual/en/function.imagejpeg.php ). So, if the path was not specified, it will be shown in the browser but if specified, then it will be downloaded as file in the specified server path.
Hopes this will help to other developers. :)
i want to cut out a piece from an existing image and save it as an new image.
$src = imageCreateFromJpeg('http://domain.com/src_test_cut.jpg');
$dest = imagecreatetruecolor(80, 40);
imagecopy($dest, $src, 0, 0, 42, 52, 357, 200);
but what i don't understand .. where did the script save the new image?
Can somebody help me please
You have not saved the new image yet. If you want to output it to a local file you have to call a save function. For instace for a png:
imagepng($dest, "filename");
In memory or temporary cache files. Until it saved or output to the browser. please look at: imagepng
I am trying to generate a PDF with an image that is also generated by php.
Sounds simple enough and I am sure I'm just screwing up the header but I can't seem to find a solution here.
first I generate a PDF:
define('FPDF_FONTPATH','fonts/');
require('scpt/fpdf.php');
class PDF extends FPDF {}
$pdf = new FPDF('P','in',array(8.5,11));
$pdf->SetAutoPageBreak(false,0);
$pdf->SetTextColor(0,0,0);
$pdf->SetDrawColor(0,0,0);
$pdf->SetFont('Helvetica','',12);
$pdf->Image('label.php?imgid=17',0,0,0,0,'PNG');
$pdf->Output('label.pdf','D');
then I generate the PNG in label.php:
if(isset($_GET["imgid"])) {
header("Content-Type: image/png");
$im = #imagecreate(110, 20)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, 0, 0, 0);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, "A Simple Text String", $text_color);
imagepng($im);
imagedestroy($im);
}
This will output: FPDF error: Not a PNG file:....
calling label.php?imgid=17 in the browser however will show me the image just fine...
What am I missing?
EDIT
In document:
Example
// Insert a logo in the top-left corner at 300 dpi
$pdf->Image('logo.png',10,10,-300);
// Insert a dynamic image from a URL
$pdf->Image('http://chart.googleapis.com/chart?cht=p3&chd=t:60,40&chs=250x100&chl=Hello|World',60,30,90,0,'PNG');
so it SHOULD be possible to include a dynamically generated image without saving it first?!
EDIT #2
I made it work with the library mem_image but the problem remains that this should not throw an error IMO?! So I leave this question open to see if there is indeed something wrong with my script of this turning out to be a bug.
You almost had it, you're missing only a couple things. First you need the full server address in the URL for your Image() call, so instead of
$pdf->Image('label.php?imgid=17',0,0,0,0,'PNG');
You need:
$pdf->Image('http://www.yourserver.com/label.php?imgid=17',0,0,0,0,'PNG');
That will eliminate the FPDF error you were encountering. Then to get FPDF to render your output correctly, you need to add a call to AddPage(), so your PDF generation script would become:
require('scpt/fpdf.php');
$pdf = new FPDF('P','in',array(8.5,11));
$pdf->AddPage();
$pdf->Image('http://www.yourserver.com/label.php?imgid=17',0,0,0,0,'PNG');
$pdf->Output('label.pdf','D');
Of course you don't need the SetTextColor(), SetFont(), etc if you're only including the single image. You didn't need the custom class definition either (I removed the unneeded lines).
Don't forget to substitute www.yourserver.com for the appropriate domain and path for your script.
The argument to the Image function needs to be a file, not a URL or another script. Since you already have your label script, the easiest work around would be to download the image to a temp location and then call $pdf->Image() with that temporary file.
This problem occurred With your file name,Make sure your passing file name is valid
function _parsepngstream($f, $file)
{
// Check signature
if($this->_readstream($f,8)!=chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10))
$this->Error('Not a PNG file: '.$file);
...
}
View allow_url_fopen directive
http://www.php.net/manual/en/filesystem.configuration.php#ini.allow-url-fopen
You need to do only changes that
require('fpdf.php');
and do the
$pdf->Image('http://www.yourserver.com/label.php?imgid=17',0,0,0,0,'PNG');
and run your code...
First, try to check your url with this code
$handle = fopen("http://www.yourserver.com/label.php?imgid=17", "rb");
print_r(fread($handle, 8192));
you with see what the contain in your url
**) make sure your url is not redirect to the login page
much more easy, only put .png in the final of dinamic chain and its all
example:
$pdf->Image('http://www.yourserver.com/label.php? imgid=17.png',0,0,0,0,'PNG');
or
$pdf->Image('../label.php?imgid=17.png',0,0,0,0,'PNG');
the mime type is not recognized in the url why does not appear png, if it's a stupid mistake but it is proven, google does the same by adding the extension with the url & PNG
$imageurl = "kaptka.gif";
$im = imagecreatefromgif($imageurl);
$b = imagecolorallocate($im, 0, 0, 0);
imagesetpixel($im, 5, 5, $b);
header('Content-Type: image/gif');
imagegif($im, "asd.gif");
kaptka.gif is normal gif image. I want to draw some pixels anywhere on the image. Asd.gif looks normal, but when i open the file it should show me both like asd.gif, but it shows just "IMAGE" text.
You are calling the function imagegif() with a filename. This will write the image to disc. To display the contents, simply call it without the filename: this will pass the contents to the output stream, which means it will be sent to the client's browser. One way to do both is to call it twice, once to save the file, and once to display it.
When saving the file, you can assign the result to a variable $foo=imagegif($im, 'bar.gif') and then check the result to see if the save was successful. A FALSE means it failed.
You say the image saved to the server is OK, so the reason you are getting an "IMAGE text" in your browser is probably because you are sending a PNG header, but no data (because of the way you called imagefig()).
Any way I can cut out a part of an existing image, and then save the result as a new image(file)?
imagecopy allows you to specify x,y,w,h arguments for the src image. Combine this with imagecreatetruecolor and you should easily be able to achieve what you want. There is even an example in the documentation for imagecopy:
// Create image instances
$src = imagecreatefromgif('php.gif');
$dest = imagecreatetruecolor(80, 40);
// Copy
imagecopy($dest, $src, 0, 0, 20, 13, 80, 40);
Use imagejpeg or imagepng to save the image to a file.
You can use the gd functions for this (manual).
Load the source image (imagecreatefromstring() can be useful, so you don't have to specify the type of the image), create an output image (imagecreatetruecolor()) and use imagecopy() (if you don't want to resize it). At the end use imagepng() to output the image, or save it to a file.
Be warned that gd doesn't use image compression in memory, so your PHP process might require lots of RAM when creating a high resolution mosaic. Use imagefree() as soon as possible.