locale.php

<?php

session_set_cookie_params(['samesite' => 'Strict']);
session_start();
include 'config.php';

if ($OF_USE_LOCALES) {
    if (isset($_GET["lang"])) {
        $locale = $_GET["lang"];
        $_SESSION["locale"] = $locale;
    } else {
        $locale = $_SESSION["locale"] ?? "en_US";
    }
    $locale .= ".utf8";
    setlocale(LC_ALL, $locale);

    if (substr_count($_SERVER['SCRIPT_NAME'], '/') == 1) {
        $path = ".";
    } else {
        $path = "..";
    }
    bindtextdomain("messages", $path . "/locale");
    textdomain("messages");
    header("Content-type: text/html; charset=utf-8");
} else {
    $locale = "en_US.utf8";

    function _($string) {
        return $string;
    }
}

/**
 * Generate select box (pulldown) with all known locales
 * Box ID is "locale" and it triggers JS changeLocale() when selection is changed
 *
 * @param $dbh PDO OpenFlights DB handler
 * @param $locale string Currently selected locale
 */
function locale_pulldown($dbh, $locale) {
    global $OF_USE_LOCALES;
    echo "<select id='locale' onChange='JavaScript:changeLocale()'>\n";
    if ($OF_USE_LOCALES) {
        $sql = "SELECT * FROM locales ORDER BY name ASC";
        foreach ($dbh->query($sql) as $row) {
            $selected = ($row["locale"] . ".utf8" == $locale ? "SELECTED" : "");
            printf(
                "<option value='%s' %s>%s (%s)</option>\n",
                $row["locale"],
                $selected,
                $row["name"],
                substr($row["locale"], 0, 2)
            );
        }
    } else {
        echo "<option value='en_US' SELECTED>English</option>\n";
    }
    echo "</select>";
}