wordPress中文截取的函数介绍

function utf8_trim($str)
{
$len = strlen($str);
for ($i=strlen($str)-1; $i>=0; $i-=1){
$hex .= ‘ ‘.ord($str[$i]);
$ch = ord($str[$i]);
if (($ch & 128)==0) return(substr($str,0,$i));
if (($ch & 192)==192) return(substr($str,0,$i));
}
return($str.$hex);
}
function mul_excerpt ($excerpt,$excerpt_length) {
$myexcerpt = substr($excerpt,0,$excerpt_length);
return utf8_trim($myexcerpt) . ‘… ‘;
}

或者这样也可以

//自动截断不乱码
// jieduan luanma
/////////////////
function Limit_Char($max_char = 200, $more_text = '...', $more_link_text = '', $limit_type = 'content') {
    if ($limit_type == 'title') { $limiter = get_the_title(); }
    else { $limiter = get_the_content(); }
    $limiter = apply_filters('the_content', $limiter);
    $limiter = strip_tags(str_replace(']]>', ']]>', $limiter));
     if (strlen($limiter) > $max_char) {
        $limiter = substr($limiter, 0, $max_char+1);
        $limiter = utf8_conver($limiter);
        echo $limiter;
        echo $more_text;
        if ($more_link_text != '') {
            echo ' '.$more_link_text.'';
        }
    } else {
        echo $limiter;
    }
}

function utf8_conver($str) {
        $len = strlen($str);
        for ($i=strlen($str)-1; $i>=0; $i-=1){
                $hex .= ' '.ord($str[$i]);
                $ch = ord($str[$i]);
        if (($ch & 128)==0) return(substr($str,0,$i));
                if (($ch & 192)==192) return(substr($str,0,$i));
        }
        return($str.$hex);
}

echo '

'. mb_substr(get_the_title(),0,18,"utf8")."..." .'

echo '

<?php get_short_title(); ?>