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PHP paginates long articles

Nov 21, 2016 pm 01:25 PM

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The original intention of the design is: article list page. If you use strip_tags to delete all styles, the article introduction on the homepage will look messy and have no style. If you simply use strip_tags to retain p or br, then p or br will be truncated when you intercept the string.

The design idea is: keep p and br, then replace p with br; then use br as the separator to separate the entire article.

The specific code is as follows: can be used directly

/**
* 长文章分段
* @param string $article 文章内容
* @param number $return_number 文章字节限制
* @return array
*/
private function ContentAddpage($content,$return_number=800){
    $return_content = &quot;&quot;;    //返回的字符串
    $current_num = 0;        //当前字符串长度
    $return_content_num = 0; //上次字符串截取后的长度；用来处理最后数组中字数过长的case.
    $page_num_word = array();//以br为分隔符使用preg_split分隔字符串生成的数组；
    $content = strip_tags($content,&#39;&lt;p&gt;,&lt;br&gt;&#39;);
    $content = preg_replace(&quot;/&lt;p(.*?)&gt;/m&quot;, &quot;&lt;br&gt;&quot;,  $content);
    $content = str_replace(&quot;&lt;/p&gt;&quot;,&quot;&quot;,  $content);
    $content = preg_replace(&quot;/&lt;br(.*?)&gt;/m&quot;, &quot;&lt;br&gt;&quot;,  $content);
    $content_info = preg_split(&quot;/\&lt;br\&gt;/&quot;,$content);//根据字符串确定段落
    $art_num = count($content_info);//确定段落数
    for($i=0;$i &lt;= $art_num-1;$i++){
        $page_num_word[$i] = strlen($content_info[$i]);
        $current_num += $page_num_word[$i];//得到字数
        if ($current_num &lt;= $return_number){
            $tmp_num = $return_number-$current_num;
            $return_content .= mb_substr($content_info[$i],0,$tmp_num).&quot;&lt;br&gt;&quot;;
            $return_content_num = $current_num;
        }else{
            $tmp_num = $return_number-$return_content_num;
            $return_content .= mb_substr($content_info[$i],0,$tmp_num).&quot;&lt;br&gt;&quot;;
            break;
        }
    }
    return $return_content;
}

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