,dedecms的cn_substr()和cn_substr_utf8()截取的字符串ms不准,平时也用习惯cn_substr(),也不愿用什么cn_substr_utf8()今天弄了下,现在还是比较准了。按照一个汉字2个字节调用就行了!
方法说明:
一、找到\include\helpers\string.helper.php把原来约33到102行(也就是定义cn_substr()函数的那段代码)替换掉,你要是怕不行,可以先把这个文件备份下,亲;
- /**
- *中英文截取字符串,汉字安2个字节
- *
- * @accesspublic
- * @param string$str 需要截取的字符串
- * @param int$cutLen 截取的长度
- * @param bool $cutSlashes 是否去掉\
- * @param bool $addSlashes 是加\
- * @param string $oDot 截取后加的字符串,如经常用的三个点
- * @param bool $hasHtml 是否有html
- * @returnstring
- */
- if ( ! function_exists(‘cn_substr’)){
- function cn_substr($str, $cutLen, $oDot = null, $hasHtml = false, $cutSlashes = false, $addSlashes = false) {
- global $cfg_soft_lang;
- $str = trim ( $str );
- if ($cutSlashes) $str = stripslashes ( $str );
- if($hasHtml){
- $str = preg_replace ( “/(\<[^\<]*\>|\r|\n|\s|\[.+?\])/is”, ‘ ‘, $str );
- $str = htmlspecialchars ( $str );
- }else{
- $str = htmlspecialchars ( $str );
- }
- if ($cutLen && strlen ( $str ) > $cutLen) {
- $nStr = ”;
- if ($cfg_soft_lang == ‘utf-8′) {
- $n = 0;
- $tn = 0;
- $noc = 0;
- while ( $n < strlen ( $str ) ) {
- $t = ord ( $str [$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 >= $cutLen)break;
- }
- if ($noc > $cutLen) $n -= $tn;
- $nStr = substr ( $str, 0, $n );
- } else {
- for($i = 0; $i < $cutLen – 1; $i ++) {
- if (ord ( $str [$i] ) > 127) {
- $nStr .= $str [$i] . $str [$i + 1];
- $i ++;
- } else {
- $nStr .= $str [$i];
- }
- }
- }
- $str = $nStr . $oDot;
- }
- if ($addSlashes) $str = addslashes ( $str );
- $str = htmlspecialchars_decode ( $str );
- return trim ( $str );
- }
- }
二、全站都使用cn_substr()函数,不管你程序是gbk还是utf8;
比如你要调用10个字(拼音汉字混杂):[field:title function='cn_substr(@me,20)']即可