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<?php
if ($_POST) {
if (isset($_POST["text"])) {
if (!empty($_POST["text"])) {
$seminarsInfo = array();
// I assume that the input will always be valid and in the format provided
// (for example, no dash in the seminar title)
preg_match_all('/(.*?)\\-(.*?)\\-(\\d{2}-\\d{2}-\\d{4}\\s+\\d{2}:\\d{2})\\s+(.*)/', $_POST["text"], $seminarsInfo, PREG_SET_ORDER);
$seminars = array();
foreach ($seminarsInfo as $seminarInfo) {
$seminars[] = new Seminar($seminarInfo[1], $seminarInfo[2], $seminarInfo[3], $seminarInfo[4]);
}
$field = $_POST["field"];
$order = $_POST["order"];
if (Seminar::validateOrderByParameters($field, $order)) {
uasort($seminars, Seminar::orderBy($field, $order));
}
echo displaySeminarsTable($seminars);
} else {
echo "<div class=\"error\">Invalid field or order.</div>";
exit;
}
} else {
echo "<div class=\"error\">No text provided.</div>";
exit;
}
}
function displaySeminarsTable($seminars)
{
$result = "<table border=\"1\" class=\"seminars-table\">";