PHP mb_convert_encoding文字编码的转换函数介绍

<?php
$str='武林网://www.VeVB.COm';
echo mb_convert_encoding($str, "UTF-8"); //编码转换为utf-8
?>

<?php
$str='武林网://www.VeVB.COm';
echo mb_convert_encoding($str, "UTF-8", "GBK"); //已知原编码为GBK，转换为utf-8
?>

<?php
$str='武林网://www.VeVB.COm';
echo mb_convert_encoding($str, "UTF-8", "auto"); //未知原编码，通过auto自动检测后，转换编码为utf-8
?>