从 PHP 5.4.0 开始,
我一直在一个简单的类上使用几种方法,这些方法对我来说效果很好,但我注意到由于strtr()
和定义了大量的翻译,它们真的很慢。 此外,它真的很长,因此更难以维护和理解。
也就是说,所有"糟糕"的例子都是现实世界问题的解决方案,这些问题将字符串转换为 UTF8。
谁能告诉我有一种众所周知或更有效的方法可以做到这一点? (是的,我已经尝试了htmlentities()
方法和iconv()
方法,但都没有真正正确替换所有时髦字符。
这是我目前使用的类:https://gist.github.com/2559140
mbstring 支持现在默认启用(但未加载)。加载扩展,这使您可以执行以下操作:
<? //PHP 5.4+
$ensureIsUTF8 = static function($data){
$dataEncoding = mb_detect_encoding(
$data,
['UTF-8', 'windows-1251', 'iso-8859-1', /*others you encounter*/],
true
);
//UTF-16/32 encoding detection always fails for PHP <= 5.4.1
//Use detection code copied from PHP docs comments:
//http://www.php.net/manual/en/function.mb-detect-encoding.php
if ($dataEncoding === false){
$UTF32_BIG_ENDIAN_BOM = chr(0x00) . chr(0x00) . chr(0xFE) . chr(0xFF);
$UTF32_LITTLE_ENDIAN_BOM = chr(0xFF) . chr(0xFE) . chr(0x00) . chr(0x00);
$UTF16_BIG_ENDIAN_BOM = chr(0xFE) . chr(0xFF);
$UTF16_LITTLE_ENDIAN_BOM = chr(0xFF) . chr(0xFE);
$first2 = substr($data, 0, 2);
$first4 = substr($data, 0, 4);
if ($first4 === $UTF32_BIG_ENDIAN_BOM) {
$dataEncoding = 'UTF-32BE';
} elseif ($first4 === $UTF32_LITTLE_ENDIAN_BOM) {
$dataEncoding = 'UTF-32LE';
} elseif ($first2 === $UTF16_BIG_ENDIAN_BOM) {
$dataEncoding = 'UTF-16BE';
} elseif ($first2 === $UTF16_LITTLE_ENDIAN_BOM) {
$dataEncoding = 'UTF-16LE';
} else {
throw new Exception('Whoa! No idea what that was.');
}
}
if ($dataEncoding === 'UTF-8'){
return $data;
} else {
return mb_convert_encoding(
$data,
'UTF-8',
$dataEncoding
);
}
};
$utf8Data = $ensureIsUTF8(file_get_contents('something'));
$utf8Data = $ensureIsUTF8(file_get_contents('http://somethingElse'));
$utf8Data = $ensureIsUTF8($userProvidedData);
?>