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Monday, 18 November 2013

How to take a screenshot of the current screen of web page and save it as a png image through php

// an example html page
<!DOCTYPE html>
<html>
<head>
    <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
    <script type="text/javascript" src="./javascripts/html2canvas.js"></script>
    <script type="text/javascript">
        $(document).ready(function(){
            $('#screenshot').on('click', function(e){
                e.preventDefault();
                html2canvas($('body'), {
                    onrendered: function(canvas){
                        var imgString = canvas.toDataURL();
                        window.open(imgString);
                        $.ajax({
                            url: '',
                            type: 'POST',
                            data: {
                                file: imgString
                            },
                            success: function(response){
                                //alert('Everything works fine.');
                            },
                            error: function(response){
                                //alert('Server response error.');
                            }
                        });
                    }
                });
            });
        });
    </script>
</head>
<body>

<div style="width: 800px; margin: auto;">
    <input type="button" id="screenshot" value="Screenshot!"/>
    <div style="height: 100px;border: 1px solid #D8D8D8;">
        Big header!
    </div>
    <div style="height: 500px;border: 1px solid #D8D8D8;">
        Medium Content
    </div>
</div>

</body>
</html>



// Your php side script
<?php
if($_POST['file'] != "") {
    header('Content-Type: application/json');
    $file = base64_decode(str_replace('data:image/png;base64,','',$_POST['file']));
    $im = imageCreateFromString($file);
    if($im){
        $save = imagepng($im, '/path/to/the/new/file.png');
        echo json_encode(array('file' => true));
    }
    else {
        echo json_encode(array('error' => 'Could not parse image string.'));
    }
    exit();
}

?>
 
 
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