<?php

function getFirstNRowsFromTable($url,$n) {
    $pageHTML = file_get_contents($url);

    $lastFoundPosition = 0;
    $trsCount = 0;
    $trsList = array();
    do {
        $foundPosition = strpos($pageHTML, '<tr>', $lastFoundPosition + 1);
        if($foundPosition > 0) {
            if($trsCount > 1) {
                $trsList[] = substr($pageHTML, $lastFoundPosition + 4, $foundPosition - $lastFoundPosition - 4);
            }
            $trsCount++;
            $lastFoundPosition = $foundPosition;
        }
    }
    while($trsCount < $n+2);

    return $trsList;

}

// gets table rows in array, each elements is string between <tr> and </tr>
$tableRows = getFirstNRowsFromTable('http://posta.garda.sk/',4);

// print outs table
$tableHTML = '<table>';
foreach($tableRows as $tableRow) {
    $tableHTML .= '<tr>' . $tableRow . '</tr>';
}
$tableHTML .= '</table>';

print $tableHTML;

?>