Is it possible to use JavaScript in conjunction with PHP to achieve the desired window size and behavior?

Yes, it is possible to use JavaScript in conjunction with PHP to achieve the desired window size and behavior. You can use PHP to dynamically generate JavaScript code that will set the window size and behavior when the page loads.

<?php
echo '<script>';
echo 'window.onload = function() {';
echo 'window.resizeTo(800, 600);'; // set window size to 800x600
echo 'window.moveTo(100, 100);'; // set window position to (100, 100)
echo '};';
echo '</script>';
?>