php mb_convert_encoding 字符串编码

1介绍mb_convert_encoding( $str, $encoding1,$encoding2 )$str，要转换编码的字符串$encoding1，目标编码，如utf-8,gbk，大小写均可$encoding2，原编码，如utf-8,gbk，大小写均可2实例1<?php$str='编码';echo mb_convert_encoding($str, "UTF-8"); //编码转换为utf-8?>3实例2<?php$str='编码';echo mb_convert_encoding($str, "UTF-8", "GBK"); //已知原编码为GBK，转换为utf-8?>4实例3<?php$str='编码';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?>