Save HTML table as an image

Question

I have a website I am building that takes data (the person's name) from a form and posts it into a customized "note" in a table on the next page. I want the user to then be able to save their "note" as an image with their customized name on it. Is there a way to save a SPECIFIC HTML TABLE as a PNG? Maybe take a screenshot of a specific coordinate on a web page?

If not is there a way to render posted PHP content from the form in an HTML canvas?

Any help would be great. I'm in a little over my head right now.

Answer 1

workable solution

• use fpdf to create pdf from html (table)
• use imagemagick to convert pdf to png

Answer 2

You can also use Xvfb. It's a linux package. It stands for "X-window Virtual Frame Buffer" (if you were wondering why on earth it had such an esoteric name).

What that will do, is load a page, execute any JavaScript and apply the different stylings from CSS, all in the frame-buffer of the server. Then you can save the image.

Xvfb will probably not be available on most shared-hosting services, however, if that doesn't matter, then it would be a viable solution.

Answer 3

While you can render HTML using a variety of tools, you can't be sure that those tools will render the HTML the same way your browser renders it.

If your end goal is to generate an image with text on it, then let's solve that problem instead of trying to make the solution you suggested work.

Have a look at PHP's imagettftext() function. It contains an Example #1 which creates a small, simple image from text that can be stored in any variable ... including a form variable.

By using this example, and adding a few other of PHP's GD functions, you can make a decent replica of a table, and make sure it looks exactly the way you want it, rather than the way html2ps or some other tool renders it.

<?php
// Set the content-type
header('Content-Type: image/png');

// Create the image
$im = imagecreatetruecolor(400, 30);

// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);

// The text to draw
$text = isset($_POST['name']) ? $_POST['name'] : "name";
// Replace path by your own font path
$font = 'arial.ttf';

// Add some shadow to the text
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);

// Add the text
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);

// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>

Here's sample output generated by the above script:

Note that you'll need to provide arial.ttf per the instructions at the link above.

If things don't work, look for errors both on-screen and in your web server's error log FIRST, before following up here. It's possible that PHP's GD module is not installed on your web server. If this is the case, you should check with your server administrator to make sure what you need is available to you.

Answer 4

You can use something like html2ps

Answer 5

You can try this JS library on client side.