如何在PHP上将任何字符编码转换为UTF8

function convertToUTF8($string, $sourceEncoding) {
    return iconv($sourceEncoding, "UTF-8//TRANSLIT", $string);
}

$string = "这是一个测试字符串";
$sourceEncoding = "GBK";
$utf8String = convertToUTF8($string, $sourceEncoding);
echo $utf8String;

function convertToUTF8($string, $sourceEncoding) {
    return mb_convert_encoding($string, "UTF-8", $sourceEncoding);
}

$string = "这是一个测试字符串";
$sourceEncoding = "GBK";
$utf8String = convertToUTF8($string, $sourceEncoding);
echo $utf8String;