<?php
    //original string from textarea
    $string = "1. Vojta\n 2. Zdenda \n 3.Kamarádovi rodiče";
    $lines = explode("\n", $string);
    print_r($lines);
    foreach ($lines as $line) {
        $matches = [];
        preg_match('/^([1-9\ ]*)[\.\ ]*(.*)/', $line, $matches);
        //if no matches found in arrray will be 0 rows
        if(count($matches) > 0) {
            echo trim($matches[2]) . "\n";
        }
    }
?>