DOM created screenshots as PNG files

Question

I am using html2canvas.js to create a screenshot of a webpage. The only thing is that I don't know how to transfer this data to an image file format so that I can save it and link it in the database.

This is my current code:

<script language="Javascript">
    setInterval(function() {
        html2canvas(document.body, {
            onrendered: function(canvas2) {
                context.drawImage(video, 0, 0, 240, 180);
                $.post(
                    "' . self::get_link('save_screenshots') . '",
                    "user_id=' . module_security::get_loggedin_id() .
                    '&screenshot=" + encodeURI(canvas2.toDataURL())
                );
                document.body.appendChild(canvas2)
            }
        })
    }, 1*60*1000);
</script>

Answer 1

This may help you:

<?php
    // requires php5
    define('UPLOAD_DIR', 'your/images/directory/');
    $img = $_POST['img'];
    $img = str_replace('data:image/png;base64,', '', $img);
    $img = str_replace(' ', '+', $img);
    $data = base64_decode($img);
    $img_file = UPLOAD_DIR . uniqid() . '.png';
    $success = file_put_contents($img_file, $data);
    if($img_file){
        // store the link to database
    } else{
       //return error msg
    }

?>