09c07-4.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 62 行

<?php
// This is a library, that by including it, automatically determines
// the proper language to use and includes the language file.

// First define an array of all possible languages:
$languages = array('en' => 'English', 'fr' => 'French', 'de' => 'German');

// Look at the GET string to see if lang is specified:
if (isset($_GET['lang'])) {
    // It's been specified, so set the language
    $lang = $_GET['lang'];
    // While here, send a cookie to remember this selection for 1 year.
    setcookie('lang', $lang, time()+(3600*24*365));
}
// Ok, otherwise look for the cookie itself:
elseif (isset($_COOKIE['lang'])) {
    // Use this
    $lang = $_COOKIE['lang'];
} else {
    // Otherwise, default to English
    $lang = 'en';
}

// Make sure that the language string we have is a valid one:
if (!(in_array($lang, array_keys($languages)))) {
    die("ERROR: Bad Language String Provided!");
}

// Now include the appropriate language file:

// LIVE Version:
//require_once "{$lang}.php"

// TESTING Version:
$langfiles = array('en' => '09c07-1', 'fr' => '09c07-2', 'de' => '09c07-3');
require_once "{$langfiles[$lang]}.php";

// As one last step, create a function that can be used to output
// language options to the user:
function switch_language_options() {
    // Include a few globals that we will need:
    global $text, $languages, $lang;
    
    // Start our string with a language specific 'switch' statement:
    $retval = $text['switch'];

    // Loop through all possible languages to create our options.
    $get = $_GET;
    foreach ($languages as $abbrv => $name) {
        // Create the link, ignoring the current one.
        if ($abbrv !== $lang) {
            // Recreate the GET string with this language.
            $get['lang'] = $abbrv;
            $url = $_SERVER['PHP_SELF'] . '?' . http_build_query($get);
            $retval .= " <a href=\"{$url}\">{$name}</a>";
        }
    }

    // Now return this string.
    return $retval;    
}
?>