PHP字符串截取方法,支持中文和其他编码:
/** +---------------------------------------------------------- * 字符串截取,支持中文和其他编码 +---------------------------------------------------------- * @static * @access public +---------------------------------------------------------- * @param string $str 需要转换的字符串 * @param string $start 开始位置 * @param string $length 截取长度 * @param string $charset 编码格式 * @param boolean $suffix 截断显示字符 * @param boolean $stripTags 是否去掉HTML及PHP的标记 +---------------------------------------------------------- * @return string +---------------------------------------------------------- */ function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true, $stripTags=false) { $str = $stripTags ? strip_tags($str) : $str; if(function_exists("mb_substr")) $slice = mb_substr($str, $start, $length, $charset); elseif(function_exists('iconv_substr')) { $slice = iconv_substr($str,$start,$length,$charset); if(false === $slice) { $slice = ''; } }else{ $re['utf-8']="/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/"; $re['gb2312']="/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/"; $re['gbk'] ="/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/"; $re['big5']="/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/"; preg_match_all($re[$charset], $str, $match); $slice = join("",array_slice($match[0], $start, $length)); } if($slice == $str){ return $str; }else{ return $suffix ? $slice.'...' : $slice; } }
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