Script to delete orphaned packages on Arch Linux

#!/usr/bin/php
<?php
$x = exec('pacman -Qdt',$pkgs);
#print_r($pkgs);
$pkgs = preg_replace("# .+#", "", $pkgs);
#print_r($pkgs);
foreach($pkgs as $pkg){
    echo 'Delete '.$pkg.'? [y/n]'.PHP_EOL;
    $answer = trim(fgets(STDIN));
    if($answer == 'y' or $answer =='н') {
        system('pacman -R --noconfirm '.$pkg, $retval);
        if (!$retval)
         echo $pkg.' is deleted'.PHP_EOL;
    }
}
?>