php - 在 html 结束标记后剪切文本

Question

我的网站有一个评论系统，有些用户写的评论很长，超过 500 个字符，我需要在 200 个字符后将其剪切并添加“查看更多”选项。问题是用户可以使用 <a>test</a>标签，在某些情况下，200 个字符的限制会在中间切割标签，例如 <a>t或 <a或 <a>test</如果发生上述任何情况，限制应延伸到 html 标记的末尾，例如 <a>test</a>

我有这个代码:

function truncate($string,$length=200,$append="…") {
  $string = trim($string);

  if(strlen($string) > $length) {
    $string = wordwrap($string, $length);
    $string = explode("\n", $string, 2);
    $string = $string[0] . $append;
  }

  return $string;
}

知道怎么做吗？

谢谢

Answer 1

嗯，我想我做到了。如果有人有任何建议，请随时修改此答案或评论。

function cut_text($string, $length = 350, $append = "…")
{

    $string = trim($string);
    $string_length = strlen($string);
    $original_string = $string;
    if ($string_length > $length) {
        $remaining_chars = $string_length - $length;
        if (strpos($string, '<') !== false && strpos($string, '>') !== false) {
            $string = wordwrap($string, $length);
            $string = explode("\n", $string, 2);
            $string = $string[0] . $append;
            $fillimi = substr_count($string, '<');
            $fundi = substr_count($string, '>');
            if ($fillimi == $fundi) {
                $string = $string;
            } else {
                $i = 1;
                while ($i <= $remaining_chars) {
                    $string = wordwrap($original_string, $length + $i);
                    $string = explode("\n", $string, 2);
                    $new_remaining_chars = $string_length - ($length + $i);
                    if ($new_remaining_chars > 0) {
                        $string = $string[0] . $append;
                    } else {
                        $string = $string[0];
                    }
                    $fillimi = substr_count($string, '<');
                    $fundi = substr_count($string, '>');
                    if ($fillimi == $fundi) {
                        $string = $string;
                        break;
                    }
                    $i++;
                }
            }
        } else {
            $string = trim($string);

            $string = wordwrap($string, $length);
            $string = explode("\n", $string, 2);
            $string = $string[0] . $append;

        }
    }
    return $string;
}