iconv_get_encoding — 获取 iconv 扩展的内部配置变量
iconv_mime_decode_headers — 一次性解码多个 MIME 头字段
iconv_mime_decode — Decodes a MIME header field
iconv_mime_encode — Composes a MIME header field
iconv_set_encoding — 为字符编码转换设定当前设置
iconv_strlen — 返回字符串的字符数统计
iconv_strpos — Finds position of first occurrence of a needle within a haystack
iconv_strrpos — Finds the last occurrence of a needle within a haystack
iconv_substr — 截取字符串的部分
iconv — 字符串按要求的字符编码来转换
ob_iconv_handler — 以输出缓冲处理程序转换字符编码