Vyhledávání ze seznamu

<form>
    <input type="text" name="search">
    <input type="submit" value="Hledat">
</form>
<?php
// vykucháno z Nette
function normalize($s) {
    $s = preg_replace('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{2FF}\x{370}-\x{10FFFF}]#u', '', $s);
    $s = strtr($s, '`\'"^~', "\x01\x02\x03\x04\x05");
    if (ICONV_IMPL === 'glibc') {
        $s = @iconv('UTF-8', 'WINDOWS-1250//TRANSLIT', $s);
        $s = strtr($s, "\xa5\xa3\xbc\x8c\xa7\x8a\xaa\x8d\x8f\x8e\xaf\xb9\xb3\xbe\x9c\x9a\xba\x9d\x9f\x9e"
            . "\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3"
            . "\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8"
            . "\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe\x96",
            "ALLSSSSTZZZallssstzzzRAAAALCCCEEEEIIDDNNOOOOxRUUUUYTsraaaalccceeeeiiddnnooooruuuuyt-"
        );
    } else {
        $s = @iconv('UTF-8', 'ASCII//TRANSLIT', $s);
    }
    $s = str_replace(array('`', "'", '"', '^', '~'), '', $s);
    $s = strtr($s, "\x01\x02\x03\x04\x05", '`\'"^~');
    $s = strtolower($s);
    $s = preg_replace('#[^a-z0-9]+#i', '-', $s);
    $s = trim($s, '-');
    return $s;
}

$expressions = [
"Jak ustlat postel" => "http://bla.cz/jak-ustlat-postel",
"Jak uklidit pradlo" => "http://bla.cz/jak-uklidit-pradlo"
];

$phrase = isset($_GET['search']) ? $_GET['search'] : "";

$normalizedPhrase = normalize($phrase);

foreach ($expressions as $key => $value) {
    $normalizedKey = normalize($key);
    if (strpos($normalizedKey, $normalizedPhrase) !== false || strpos($normalizedPhrase, $normalizedKey) !== false) {
        echo "<a href=\"$value\">$value</a><br>\n";
    }
}