1. 截取GB2312中文字符串
<?php < ?php //截取中文字符串 function mysubstr($str, $start, $len) { $tmpstr = ""; $strlen = $start + $len; for($i = 0; $i < $strlen; $i++) { if(ord(substr($str, $i, 1)) > 0xa0) { $tmpstr .= substr($str, $i, 2); $i++; } else $tmpstr .= substr($str, $i, 1); } return $tmpstr; } ?>
2. 截取utf8编码的多字节字符串
<?php < ?php //截取utf8字符串 function utf8Substr($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
<?php < ?php /* 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, $sublen)); } else { $start = $start*2; $sublen = $sublen*2; $strlen = strlen($string); $tmpstr = ''''; for($i=0; $i< $strlen; $i++) { if($i>=$start && $i< ($start+$sublen)) { if(ord(substr($string, $i, 1))>129) { &nbs |