Kill all x11 windows, empty ram and swap, empty trash bin | php bash script

winkill

#!/usr/bin/php

<?php

// Get all x11 windows
$windows = system("wmctrl -l | cut -f1 -d' ' > winlist");

$list = file("winlist");

foreach($list as $kill){

  system("xdotool windowkill $kill");

}

// Remove window list
system("rm winlist");

// Empty trash bin
system("rm -rf ~/.local/share/Trash/*");

// Clean ram and swap space
system("sync; echo 3 | sudo tee /proc/sys/vm/drop_caches | sudo swapoff -a");