/**
* 中文截取2，单字节截取模式
*
* @access public
* @param string $str 需要截取的字符串
* @param int $slen 截取的长度
* @param int $startdd 开始标记处
* @return string
*/
if ( ! function_exists('cn_substr'))
{
function cn_substr($str, $slen, $startdd=0)
{
global $cfg_soft_lang;
if($cfg_soft_lang=='utf-8')
{
return cn_substr_utf8($str, $slen, $startdd);
}
$restr = '';
$c = '';
$str_len = strlen($str);
if($str_len < $startdd+1)
{
return '';
}
if($str_len < $startdd + $slen || $slen==0)
{
$slen = $str_len - $startdd;
}
$enddd = $startdd + $slen - 1;
for($i=0;$i<$str_len;$i++)
{
if($startdd==0)
{
$restr .= $c;
}
else if($i > $startdd)
{
$restr .= $c;
}
if(ord($str[$i])>0x80)
{
if($str_len>$i+1)
{
$c = $str[$i].$str[$i+1];
}
$i++;
}
else
{
$c = $str[$i];
}
if($i >= $enddd)
{
if(strlen($restr)+strlen($c)>$slen)
{
break;
}
else
{
$restr .= $c;
break;
}
}
}
return $restr;
}
}
替换为
/**
* 中英文截取字符串，汉字安2个字节
*
* @access public
* @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 $hasHtml 是否有html
* @return string
*/
if ( ! function_exists(‘cn_substr’)){
function cn_substr($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 );
}
}
修改后全站都可以使用cn_substr()函数，不管你的程序编码是gbk还是utf8
示例：调用10个字（拼音汉字混杂）
[field:title function='cn_substr(@me,20)']