File get contents and string replace for multiple files

Question

I have a number of files, alpha.php, beta.php and gamma.php in a folder named test. I need to get the contents of these three files and and replace a string in them with another string. To replace everything in the folder, this worked:

foreach (new DirectoryIterator('./test') as $folder) {
    if ($folder->getExtension() === 'php') {
        $file = file_get_contents($folder->getPathname());
        if(strpos($file, "Hello You") !== false){
            echo "Already Replaced";
        }
        else {
            $str=str_replace("Go Away", "Hello You",$file);
            file_put_contents($folder->getPathname(), $str); 
            echo "done";
        }
    }
}

But I don't want to process all the files in the folder. I just want to get the 3 files: alpha.php, beta.php and gamma.php and process them.

Is there a way I can do this or I have to just get the files individually and process them individually? Thanks.

Answer 1

Just foreach what you want:

foreach (['alpha.php', 'beta.php', 'gamma.php'] as $filename) {
    $file = file_get_contents("./test/$filename");

    if(strpos($file, "Hello You") !== false){
        echo "Already Replaced";
    }
    else {
        $str = str_replace("Go Away", "Hello You", $file);
        file_put_contents("./test/$filename", $str); 
        echo "done";
    }
}

You don't need the if unless you really need the echos to see when there are replacements:

foreach (['alpha.php', 'beta.php', 'gamma.php'] as $filename) {
    $file = file_get_contents("./test/$filename");
    $str = str_replace("Go Away", "Hello You", $file);
    file_put_contents("./test/$filename", $str); 
}

Or you can get the count of replacements:

    $str = str_replace("Go Away", "Hello You", $file, $count);
    if($count) {        
        file_put_contents("./test/$filename", $str); 
    }

On Linux you could also try exec or something with replace or repl as they accept multiple files.