php – 显示帖子摘录,受字数限制

我正在我的PHP网站(不是WordPress网站)上主索引我显示两个最新的帖子.事情是在描述它显示整篇文章我发现自己需要显示后摘录可能35字限制.

<?=$line["m_description"]?>

<?
$qresult3 = MysqL_query("SELECT * FROM t_users WHERE u_id=".$line["m_userid"]." LIMIT 1");
if (MysqL_num_rows($qresult3)<1) { ?>

解决方法:

<?PHP

// just the excerpt
function first_n_words($text, $number_of_words) {
   // Where excerpts are concerned, HTML tends to behave
   // like the proverbial ogre in the china shop, so best to strip that
   $text = strip_tags($text);

   // \w[\w'-]* allows for any word character (a-zA-Z0-9_) and also contractions
   // and hyphenated words like 'range-finder' or "it's"
   // the /s flags means that . matches \n, so this can match multiple lines
   $text = preg_replace("/^\W*((\w[\w'-]*\b\W*){1,$number_of_words}).*/ms", '\\1', $text);

   // strip out newline characters from our excerpt
   return str_replace("\n", "", $text);
}

// excerpt plus link if shortened
function truncate_to_n_words($text, $number_of_words, $url, $readmore = 'read more') {
   $text = strip_tags($text);
   $excerpt = first_n_words($text, $number_of_words);
   // we can't just look at the length or try == because we strip carriage returns
   if( str_word_count($text) !== str_word_count($excerpt) ) {
      $excerpt .= '... <a href="'.$url.'">'.$readmore.'</a>';
   }
   return $excerpt;
}

$src = <<<EOF
   <b>My cool story</b>
   <p>Here it is. It's really cool. I like it. I like lots of stuff.</p>
   <p>I also like to read and write and carry on forever</p>
EOF;

echo first_n_words($src, 10);

echo "\n\n-----------------------------\n\n";

echo truncate_to_n_words($src, 10, 'http://www.google.com');

编辑：添加功能示例并在文本中考虑标点符号和数字