php-x11/examples/find_windows.php

<?php

require_once __DIR__."/../vendor/autoload.php";

use NoccyLabs\X11\WindowList;

// Create a list of all windows
$windows = new WindowList();
$windows->dump();

// Select only visible windows
$visible = $windows->visible();
$visible->dump();

// Select all the windows with a title matching *code*
$codewindows = $visible->find("*code*");
if (count($codewindows)==0) {
    printf("Sorry, couldn't find any vscode instances running!\n");
    exit;
}
$codewindows->dump();

// Grab the first window
$codewindow = $codewindows->first();
$codewindow->dump();

// Focus the window and simulate F1 being pressed
$codewindow->focus()->activate()->sendKeys("F1");