函数限制单词，然后显示剩余的文本 - Function to Limit Words, then show left over text

我有一个div，它有一个read more按钮。read more按钮展开文本，展开的文本在它下面的第二个div中。完全卡住。请帮忙。以下代码：

<?PHP
function limit_words($string, $word_limit){
    $words = explode(" ",$string);
    return implode(" ",array_splice($words,0,$word_limit));
}
$text = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus.";
?>
<div class="slidewrap">
    <img src="images/slides/image.jpg" alt="Image Title" />
    <h3>Title</h3>
    <p><?PHP echo(limit_words($text,50)); ?></p>
    <p><a href="#" class="readmore"><img src="images/icons/readmore.png" alt="" /></a></p>
    <div class="readmorexpand">
        <p><?PHP echo($leftovertext); ?></p>
    </div>
</div>

试试这个：

<?php
function limit_words($string, $word_limit){
    $words = explode(" ",$string);
    return implode(" ",array_splice($words,0,$word_limit));
}
$text = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus.";
$start = limit_words($text,50);
$end = str_replace($start, '', $text);
?>
<div class="slidewrap">
    <img src="images/slides/image.jpg" alt="Image Title" />
    <h3>Title</h3>
    <p><?php echo $start; ?></p>
    <p><a href="#" onclick="document.getElementById('readmorexpand').style.display = '';" class="readmore"><img src="images/icons/readmore.png" alt="" /></a></p>
    <div class="readmorexpand" id="readmorexpand" style="display:none">
        <p><?php echo $end; ?></p>
    </div>
</div>

上面的代码对我来说很好。只是想分享我的代码，我还添加了一些小代码来检查是否需要处理字符串。下面的代码将检查字符串计数，然后将字符串处理为array_splice，以确保提供的字符串是否需要缩短。

    function limit_words($string, $word_limit){
        $words = explode(" ",$string);
        if(count($words)>$word_limit){
           return implode(" ",array_splice($words,0,$word_limit));
        }else{
           return $string;
        }
    }

您从哪里"获得"剩余的文本？

试试这样的东西：

<?PHP
function limit_words($string, $word_limit){
    $words = explode(" ",$string);
    $ar = array();
    $ar[] = implode(" ",array_splice($words,0,$word_limit));
    $ar[] = implode(" ",array_splice($words,$word_limit));
    return $ar;
}
$text = "Lorem ipsum dolor ... snip ...  eleifend tellus.";

/** $ar contains the text split at the 50th "word" */
$ar = limit_words($string, 50)
?>
<div class="slidewrap">
    <img src="images/slides/image.jpg" alt="Image Title" />
    <h3>Title</h3>
    <p><?PHP echo $ar[0]; ?></p>
    <p><a href="#" class="readmore"><img src="images/icons/readmore.png" alt="" /></a></p>
    <div class="readmorexpand">
    <p><?PHP echo $ar[1]; ?></p>
    </div>
</div>