Prepending and Appending to your keyword lists - Gift to you PHP script

<?php
/*
 * Made by: The Force a.k.a dacash
 *
 * Usage: preApp.php keyword.txt append.txt outfile.txt
 */

if($argc < 5){
    echo "Usage: preApp.php keyword.txt append.txt outfile.txt\n";
}else{
    $key = file($argv[1]);
    $app = file($argv[2]);
    $out = fopen($argv[3], "w");
    
    foreach($key as $keys){
        $keys = trim($keys);
        
        fwrite($out, $keys."\n");
        foreach($app as $todoApp){
            $todoApp = trim($todoApp);
            fwrite($out, $keys." ".$todoApp."\n");
            fwrite($out, $todoApp. " ".$keys."\n");
        }
    }
    fclose($out);
}
?>