php 截取中文字符
<?php/**截取字符串*bilibo@2011-06-23*/class StringHelper extends AppHelper {function CutStr($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 ) - $start > $sublen ) { return join('', array_slice($t_string, $start, $sublen)); } return join('', array_slice($t_string, $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) $tmpstr.= substr($string, $i, 2); else $tmpstr.= substr($string, $i, 1); } if( ord( substr($string, $i, 1 ) ) > 129 ) $i++; } if( strlen($tmpstr) < $strlen ) return $tmpstr; } }}?>
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