My environment is Windows Server 2016 and IIS 10. In my PHP script I’m trying to run Google Chrome in a headless mode to get html code of an external web page:

```
<?php
$chromeApp = "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe";

$command = "\"$chromeApp\" --headless --disable-gpu \
 --dump-dom $urladdress > page.html";

exec ($command);
?>

```

That code works if I run 

`>C:\php script.php` 

from the Command line. It also works if I run the actual command:

```
>"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" \
--headless --disable-gpu --dump-dom https://google.com > page.html

```

But if I run that script from a browser it creates empty page.html file and hungs till timeout. However if I restart IIS during its execution I get the page.html file filled with the needed data.

What could be a problem here?