gistfile1.txt

<?php


if(isset($_POST['Fetch'])){
    $file_names = "playlista.txt";
    $current_names = file_get_contents($file_names);
    echo nl2br($current_names);
}


if(isset($_POST['Save']) && !empty($_POST['textbox'])){

    $file_names = "playlista.txt";
    $current_names_onfile = file_get_contents($file_names);
    $current_names = $_POST["textbox"];
    $arr = explode("\r", $current_names);
    foreach($arr as $name)
    {
        #remove line breaks
        $name = preg_replace('/[\r\n]/m', '', $name);
        #if the name doesn't exist on file stores it.
       if (!preg_match("/^\b$name\b\$/m", $current_names_onfile)) {
       file_put_contents("playlista.txt", PHP_EOL.$name, FILE_APPEND);
       }else{
           echo "$to juz jest dodane!<br />";
       }
    }

    $file_names = "playlista.txt";
    $current_names = file_get_contents($file_names);
    echo nl2br($current_names);

   }else if(isset($_POST['Save'])){
    echo "wpisz coś!";
}




?>