We make screenshots of sites

Wandering through the PHP documentation spaces, I stumbled upon two functions: imagegrabwindow and imagegrabscreen . They know how to take screenshots in Microsoft Windows.

Interested. It ended with the fact that the script was written generating a full screenshot of any site.

So we need:

• Internet Explorer ActiveX component and documentation .
• PHP 5.2.2+

The imagegrabwindow function provides a good example for use.

$browser = new COM( "InternetExplorer.Application" );

$handle = $browser->HWND;

$browser->Visible = true ;

$browser->Navigate( "http://www.libgd.org" );



/* Still working? */

while ($browser->Busy) {

com_message_pump(4000);

}

$im = imagegrabwindow($handle, 0);

$browser->Quit();

imagepng($im, "iesnap.png" );

imagedestroy($im);



* This source code was highlighted with Source Code Highlighter .

But it has a big drawback - what size the browser window has opened, so we will get a screenshot .

In order to fix this, I had to write a script that additionally does the following things:

• Opens the browser window to full screen in full screen mode.
• Disables the status bar.
• Overwrites scrolling
• Makes the required number of screenshots of the page by scrolling the page and combines them

Coder

<?php

$browser = new COM( "InternetExplorer.Application" );

$browser->Visible = true ;

$browser->Fullscreen = true ;

$browser->StatusBar = false ;



$browser->Navigate( "http://www.habrahabr.ru" );

while ($browser->Busy)

com_message_pump(4000);



$handle = $browser->HWND;

$screenWidth = $browser->Width;

$screenHeight = $browser->Height;

$documentHeight = $browser->Document->body->scrollHeight;



$scrollWidth = 20;

$scrollHeight = 20;

$testPartSize = 10*1024;



$im = imagecreatetruecolor($screenWidth - $scrollWidth, $documentHeight);

for ($top = 0; $top < $documentHeight; $top += $screenHeight)

{

$browser->Document->documentElement->scrollTop=$top;

while ($browser->Busy)

com_message_pump(4000);

echo $browser->Document->documentElement->scrollTop.PHP_EOL;



for ($i = 0; $i < 5; $i++)

{

$part = imagegrabwindow($handle, 0);

$dark = imagecolorallocate($part, 0, 0, 0);

imagefilledrectangle($part, $screenWidth - $scrollWidth, 0, $screenWidth, $screenHeight, $dark);

$testFile = sprintf( "screenshot_%05d.png" , $top);

imagepng($part, $testFile, 9, PNG_ALL_FILTERS);

clearstatcache();

if (filesize($testFile) > $testPartSize)

break ;



echo "Bad part, name: {$testFile}, try to generate again." .PHP_EOL;

}



imagecopy(

$im, $part,

0, $top,

0, (!$top || ($top + $screenHeight) < $documentHeight) ? 0 : $screenHeight - $scrollHeight - $documentHeight % $screenHeight,

$screenWidth - $scrollWidth, $screenHeight);

imagedestroy($part);

}

imagepng($im, "screenshot.png" , 9, PNG_ALL_FILTERS);

imagedestroy($im);



$browser->Quit();



* This source code was highlighted with Source Code Highlighter .

Code Notes

• Sometimes for unknown reasons, a screenshot is taken, and there is a black screen, in order to eliminate it, the captured piece is recorded in a file with a scrolling erased, and then the file size is checked. If the file is small, most likely you need to re-shoot.
• If you want to quickly protest, you can use the following command line:
  
  

  php -d extension_dir=c:\php\ext\ -d extension=php_gd2.dll ie.php



  where ie.php is the script above.
• You can run from under Apache, but for this you need to change the security settings. The documentation for these functions says what to do.
  
  

')

And as in other browsers

For FireFox I found the Embedded Mozilla section, unfortunately it requires coding, but when writing a full-fledged service it will turn out much more efficient.

UPD: Read komenty, there are many links to how to do it on other engines and other systems.



PS It is checked only in virtualka on IE7.

PS IE itself I hate, I use FireFox.