<?
mb_internal_encoding("UTF-8");
function delTree($dir) {

    $files = array_diff(scandir($dir), array('.','..'));

     foreach ($files as $file) {

       (is_dir("$dir/$file")) ? delTree("$dir/$file") : unlink("$dir/$file");

     }

    return rmdir($dir);
}

delTree('files');
mkdir('files');

$arrColorShema = array();
$f = fopen('offers_all_avail.csv', 'r' );
$i=0;
while (!feof($f))
{
    if ($i>2) {
        $str = fgets( $f, 3072 );
        $arStr = explode( ';', $str );

        echo '<pre>';
        var_dump([$i, $str]);
        echo '</pre>';

        if (intval($arStr[0]) && !empty($arStr[1])) {

            echo $arStr[0] . ' - ' . $arStr[1];
            echo '<hr/>';
            echo PHP_EOL;

            if ($fs = fopen('files/' . $arStr[0] . '.csv', 'a+')) {
                fwrite($fs, $arStr[1]);
                fclose($fs);
            }
        } else {
            echo '<pre>';
            var_dump([$i, $arStr]);
            echo '</pre>';

            trigger_error('Warning: Undefined array key 1', E_USER_NOTICE);
            //die();
        }
    }

    $i++;
}