使用gettext时的区域设置配置及PHP多语言翻译故障排查

我严格按照教程操作，但gettext始终无法完成翻译。当前环境是Linux虚拟主机，PHP版本8.2.1，phpinfo显示gettext已启用，无法定位问题所在。另外想请教，gettext是否并非多语言网站的理想解决方案？

PO文件内容 #

msgid ""
msgstr ""
"Project-Id-Version: \n"
"POT-Creation-Date: 2014-03-22 14:45+0100\n"
"PO-Revision-Date: 2023-01-28 12:39+0100\n"
"Last-Translator: \n"
"Language-Team: \n"
"Language: en_US\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"X-Poedit-KeywordsList: _;gettext;gettext_noop\n"
"X-Poedit-Basepath: .\n"
"X-Poedit-SourceCharset: UTF-8\n"
"X-Generator: Poedit 3.2.2\n"
# Test 1
msgid "SCHOOL"
msgstr "School"

PHP代码 #

$language = "en_US.utf8";
putenv("LANG=".$language);
setlocale(LC_ALL, $language);
$domain = "messages";
bindtextdomain($domain, "Locale");
textdomain($domain);

if (!function_exists("gettext")){echo "gettext is not installed<br>";}

echo gettext("SCHOOL") . " (Works if small letters)<br>";

echo "<br><br>";
echo "Current locale: " . setlocale(LC_ALL, 0);
echo "<br><br>";
var_dump(system('locale -a'));

输出结果 #

SCHOOL (Works if small letters)

Current locale: en_US.utf8

C C.UTF-8 en_AG en_AG.utf8 en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IL en_IL.utf8 en_IN en_IN.utf8 en_NG en_NG.utf8 en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US.utf8 en_ZA.utf8 en_ZM en_ZM.utf8 en_ZW.utf8 POSIX sv_SE.utf8 string(10) "sv_SE.utf8"

我使用PoEdit创建了message.po文件，并放置在en_US/LC_MESSAGES/message.po路径下。已花费数日搜索尝试仍未解决，恳请提供解决思路。

内容的提问来源于stack exchange，提问作者johnjohn22