使用 str_word_count

根据参数，它可以返回字符串中的单词数(默认)或找到的单词数组(以防您只想使用它们的子集).

Depending on the parameters, it can either return the number of words in a string (default) or an array of the words found (in case you only want to use a subset of them).

因此，要返回一段文本的前 100 个单词:

So, to return the first 100 words of a snippet of text:

function getExcerpt($text)
{
    $words_in_text = str_word_count($text,1);
    $words_to_return = 100;
    $result = array_slice($words_in_text,0,$words_to_return);
    return '<em>'.implode(" ",$result).'</em>';
}