学步园

utf-8编码，一个汉字占三个字节：<br /> function smarty_modifier_cntruncate($string, $strlen = 20, $etc = '...', $keep_first_style = false)<br /> {<br /> $strlen = $strlen*3;<br /> $string = trim($string);<br /> if ( strlen($string) <= $strlen ) {<br /> return $string;<br /> }<br /> $str = strip_tags($string);<br /> $j = 0; www.444p.com<br /> for($i=0;$i<$strlen;$i++) {<br /> if(ord(substr($str,$i,1))>0xa0){ $i+=2; $j+=3;}<br /> else {$j++;}<br /> }<br /> $rstr=substr($str,0,$j);<br /> if (strlen($str)>$strlen ) {$rstr .= $etc;} www.444p.com php学习之家<br /> if ( $keep_first_style == true && ereg('^<(.*)></p>,$string) ) {<br /> if ( strlen($str) <= $strlen ) {<br /> return $string;<br /> }<br /> $start_pos = strpos($string,substr($str,0,4));<br /> $end_pos = strpos($string,substr($str,-4));<br /> $end_pos = $end_pos+4;<br /> $rstr = substr($string,0,$start_pos) . $rstr . substr($string,$end_pos,strlen($string));<br /> }<br /> return $rstr;<br /> }<br /> gb2312编码，一个汉字占两字节：<br /> function smarty_modifier_cntruncate($string, $strlen = 20, $etc = '...', $keep_first_style = false)<br /> {<br /> $strlen = $strlen*2;<br /> $string = trim($string);<br /> if ( strlen($string) <= $strlen ) {<br /> return $string;<br /> }<br /> $str = strip_tags($string);<br /> $j = 0;<br /> for($i=0;$i<$strlen;$i++) {<br /> if(ord(substr($str,$i,1))>0xa0) $j++;<br /> }<br /> if($j%2!=0) $strlen++;<br /> $rstr=substr($str,0,$strlen);<br /> if (strlen($str)>$strlen) {$rstr .= $etc;}<br /> if ( $keep_first_style == true && ereg('^<(.*)></p>,$string) ) {<br /> if ( strlen($str) <= $strlen ) {<br /> return $string;<br /> }<br /> $start_pos = strpos($string,substr($str,0,4));<br /> $end_pos = strpos($string,substr($str,-4));<br /> $end_pos = $end_pos+4;<br /> $rstr = substr($string,0,$start_pos) . $rstr . substr($string,$end_pos,strlen($string));<br /> }<br /> return $rstr;<br /> }<br />