php 截取中文

function mysubstr($str, $start, $len) { $tmpstr = ""; $strlen = $start + $len; for($i = 0; $i if(ord(substr($str, $i, 1)) > 0xa0) { $tmpstr .= substr($str, $i, 2); $i++; } else $tmpstr .= substr($str, $i, 1); } return $tmpstr;}?>2. 截取utf8编码的多字节字符串function utf8Substr($str, $from, $len){ return preg_replace(''#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,''.$from.''}''. ''((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,''.$len.''}).*#s'', ''$1'',$str);}?>3. UTF-8、GB2312都支持的汉字截取函数Utf-8、gb2312都支持的汉字截取函数cut_str(字符串, 截取长度, 开始长度, 编码);编码默认为 utf-8开始长度默认为 0*/ function cut_str($string, $sublen, $start = 0, $code = ''UTF-8''){ if($code == ''UTF-8'') { $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/"; preg_match_all($pa, $string, $t_string); if(count($t_string[0]) - $start > $sublen) return join('''', array_slice($t_string[0], $start, $sublen))."..."; return join('''', array_slice($t_string[0], $start,