Article Parser

<?php
$textArr = explode("\n", $_GET['text']);
$articlePattern = "/^\s*([A-Za-z\s-]+)\s*\%\s*([A-Za-z\s.-]+)\s*;\s*(\d{2}-\d{2}-\d{4})\s*-\s*(.{0,100})/";
$monthsOfYear = array('01' => 'January', '02' => 'February', '03' => 'March', '04' => 'April',
    '05' => 'May', '06' => 'June', '07' => 'July', '08' => 'August', '09' => 'September',
    '10' => 'October', '11' => 'November', '12' => 'December');

foreach ($textArr as $text) {
    if (preg_match_all($articlePattern, $text, $matches)) {
        $articleName = trim($matches[1][0]);
        $author = trim($matches[2][0]);
        $dateStr = trim($matches[3][0]);
        $dateArr = explode('-', $dateStr);
        $monthAsWord = '';
        $isValidDate = false;
        if (count($dateArr) == 3 && isset($monthsOfYear[$dateArr[1]])) {
            $monthAsWord = $monthsOfYear[$dateArr[1]];
            $isValidDate = true;
        }

        if (!$isValidDate) {
            continue;
        }

        $summary = trim($matches[4][0]);

        print_next_article($articleName, $author, $monthAsWord, $summary);
    }
}

function print_next_article($topic, $author, $when, $summary) {
    echo "<div>\n";
    echo '<b>Topic:</b> <span>' . htmlspecialchars($topic) . "</span>\n";
    echo '<b>Author:</b> <span>' . htmlspecialchars($author) . "</span>\n";
    echo "<b>When:</b> <span>{$when}</span>\n";
    echo '<b>Summary:</b> <span>' . htmlspecialchars($summary) . "...</span>\n";
    echo "</div>\n";
}