php substr截断中文半个汉字乱码问题的解决方法
-
-
/**
- * 改进的substr
- * edit bbs.it-home.org
- */
- function getstr($string, $length, $encoding = 'utf-8') {
- $string = trim($string);
- if($length && strlen($string) > $length) {
- //截断字符
- $wordscut = '';
- if(strtolower($encoding) == 'utf-8') {
- //utf8编码
- $n = 0;
- $tn = 0;
- $noc = 0;
- while ($n $t = ord($string[$n]);
- if($t == 9 || $t == 10 || (32 $tn = 1;
- $n++;
- $noc++;
- } elseif(194 $tn = 2;
- $n += 2;
- $noc += 2;
- } elseif(224 $tn = 3;
- $n += 3;
- $noc += 2;
- } elseif(240 $tn = 4;
- $n += 4;
- $noc += 2;
- } elseif(248 $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;
- }
- $wordscut = substr($string, 0, $n);
- } else {
- for($i = 0; $i if(ord($string[$i]) > 127) {
- $wordscut .= $string[$i].$string[$i + 1];
- $i++;
- } else {
- $wordscut .= $string[$i];
- }
- }
- }
- $string = $wordscut;
- }
- return trim($string);
- }
- ?>
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