php smarty truncate UTF8乱码问题解决办法

估计不少玩smarty模板的小朋友都遇到过裁切乱码问题。特别是UTF8编码的。

以下代码保存为modifier.truncate2.php 存到smarty libs下的plugin目录下

然后裁剪的时候用$v->content|truncate2:100

就搞定了。

如果不好用可能是缓存导致，请速度删除templates_c下的缓存文件（小编搞的时候遇到缓存问题。）

复制代码 代码如下:

/**
* Smarty plugin
* @package Smarty
* @subpackage plugins
*/


/**
* Smarty truncate modifier plugin
*
* Type: modifier

* Name: truncate

* Purpose: Truncate a string to a certain length if necessary,
* optionally splitting in the middle of a word, and
* appending the $etc string or inserting $etc into the middle.
* @link http://smarty.php.net/manual/en/language.modifier.truncate.php
* truncate (Smarty online manual)
* @author Monte Ohrt
* @param string
* @param integer
* @param string
* @param boolean
* @param boolean
* @return string
*/
function smarty_modifier_truncate2( $string,$length = 80,$etc='...',$count_words = true ) {
return $returnstr =substr_utf8($string, 0, $length).$etc;

}

function substr_utf8($str, $start=0, $length=-1, $return_ary=false) {
$len = strlen($str);if ($length == -1) $length = $len;
$r = array();
$n = 0;
$m = 0;

for($i = 0; $i $x = substr($str, $i, 1);
$a = base_convert(ord($x), 10, 2);
$a = substr('00000000'.$a, -8);
if ($n if (substr($a, 0, 1) == 0) {
}elseif (substr($a, 0, 3) == 110) {
$i += 1;
}elseif (substr($a, 0, 4) == 1110) {
$i += 2;
}
$n++;
}else {
if (substr($a, 0, 1) == 0) {
$r[] = substr($str, $i, 1);
}elseif (substr($a, 0, 3) == 110) {
$r[] = substr($str, $i, 2);
$i += 1;
}elseif (substr($a, 0, 4) == 1110) {
$r[] = substr($str, $i, 3);
$i += 2;
}else {
$r[] = '';
}
if (++$m >= $length) {
break;
}
}
}

return $return_ary ? $r : implode("",$r);
}
/* vim: set expandtab: */
?>

samrty的插件体系还是比较智能而且容易修改的。