Thinkphp截取标题长度加省略号

第一步 公共文件common.php创建msubstr方法，最新下新增：

/**
*+----------------------------------------------------------
* 字符串截取，支持中文和其他编码
*+----------------------------------------------------------
* @static
* @access public
*+----------------------------------------------------------
* @param string $str 需要转换的字符串
* @param string $length 截取长度
* @param string $start 开始位置
* @param string $charset 编码格式
* @param string $suffix 截断显示字符
*+----------------------------------------------------------
* @return string
*+----------------------------------------------------------
*/

function msubstr($str, $length, $start=0, $charset="utf-8", $suffix=false){
if(function_exists("mb_substr")){
$slice=mb_substr($str, $start, $length, $charset);
if($suffix){
if(mb_strlen($str,'utf-8')>$length){
return $slice."...";
}else{
return $slice;
}
}else{
return $slice;
}
}elseif(function_exists('iconv_substr')){
if($suffix){
return iconv_substr($str,$start,$length,$charset)."...";
}else{
return iconv_substr($str,$start,$length,$charset);
}
}

$re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
$re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
$re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
$re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
preg_match_all($re[$charset], $str, $match);
$slice = join("",array_slice($match[0], $start, $length));
if($suffix) {
if(strlen($slice)>$length){
return $slice."…";
}else{
return $slice;
}
}
return $slice;
}

第二步 在模板中调用

{$v.title|msubstr= 50,0,'utf-8',true}