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php截取一定长度的字符串
•php函数•阅读 288 - function ssubstr($string, $length, $dot = ' ...') {
- global $charset;
- if(strlen($string) <= $length) {
- return $string;
- }
- $string = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $string);
- $strcut = '';
- if(strtolower($charset) == 'utf-8') {
- $n = $tn = $noc = 0;
- while($n < strlen($string)) {
- $t = ord($string[$n]);
- if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
- $tn = 1; $n++; $noc++;
- } elseif (194 <= $t && $t <= 223) {
- $tn = 2; $n += 2; $noc += 2;
- } elseif (224 <= $t && $t < 239) {
- $tn = 3; $n += 3; $noc += 2;
- } elseif (240 <= $t && $t <= 247) {
- $tn = 4; $n += 4; $noc += 2;
- } elseif (248 <= $t && $t <= 251) {
- $tn = 5; $n += 5; $noc += 2;
- } elseif ($t == 252 || $t == 253) {
- $tn = 6; $n += 6; $noc += 2;
- } else {
- $n++;
- }
- if($noc >= $length)
- {
- break;
- }
- }
- if($noc > $length)
- {
- $n -= $tn;
- }
- $strcut = substr($string, 0, $n);
- } else {
- for($i = 0; $i < $length; $i++)
- {
- $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
- }
- }
- $strcut = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $strcut);
- return $strcut.$dot;
- }
- 截取一定长度的字符串（该函数对gb2312使用有效）
- <?
- function wordscut($string, $length ,$sss=0) {
- if(strlen($string) > $length) {
- if($sss){
- $length=$length - 3;
- $addstr=@# ...@#;
- }
- for($i = 0; $i < $length; $i++) {
- if(ord($string[$i]) > 127) {
- $wordscut .= $string[$i].$string[$i + 1]; //
- $i++; //开源软件:phpfensi.com
- } else {
- $wordscut .= $string[$i];
- }
- }
- return $wordscut.$addstr;
- }
- return $string;
- }
- ?>