php smarty truncate UTF8乱码问题解决办法

网络编程 2024/11/20 佚名

3 2 1

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:
<?php
/**
* Smarty plugin
* @package Smarty
* @subpackage plugins
*/

/**
* Smarty truncate modifier plugin
*
* Type:     modifier<br>
* Name:     truncate<br>
* 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 <monte at ohrt dot com>
* @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 < $len; $i++) {
        $x = substr($str, $i, 1);
        $a = base_convert(ord($x), 10, 2);
        $a = substr('00000000'.$a, -8);
        if ($n < $start) {
            if (substr($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。