php - 将大字符串拆分成数组，但拆分点不能打断标签

Question

我编写了一个脚本，将大段文本发送给 Google 进行翻译，但有时文本(即 html 源代码)最终会在 html 标记中间拆分，Google 将错误地返回代码。

我已经知道如何将字符串拆分成一个数组，但是有没有更好的方法来做到这一点，同时确保输出字符串不超过 5000 个字符并且不在标签上拆分？

更新:感谢回答，这是我最终在项目中使用的代码，效果很好

function handleTextHtmlSplit($text, $maxSize) {
    //our collection array
    $niceHtml[] = '';

    // Splits on tags, but also includes each tag as an item in the result
    $pieces = preg_split('/(<[^>]*>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);

    //the current position of the index
    $currentPiece = 0;

    //start assembling a group until it gets to max size

    foreach ($pieces as $piece) {
        //make sure string length of this piece will not exceed max size when inserted
        if (strlen($niceHtml[$currentPiece] . $piece) > $maxSize) {
            //advance current piece
            //will put overflow into next group
            $currentPiece += 1;
            //create empty string as value for next piece in the index
            $niceHtml[$currentPiece] = '';
        }
        //insert piece into our master array
        $niceHtml[$currentPiece] .= $piece;
    }

    //return array of nicely handled html
    return $niceHtml;
}

Answer 1

注意:还没有机会对此进行测试(因此可能存在一两个小错误)，但它应该给您一个想法:

function get_groups_of_5000_or_less($input_string) {

    // Splits on tags, but also includes each tag as an item in the result
    $pieces = preg_split('/(<[^>]*>)/', $input_string,
        -1, PREG_SPLIT_DELIM_CAPTURE);

    $groups[] = '';
    $current_group = 0;

    while ($cur_piece = array_shift($pieces)) {
        $piecelen = strlen($cur_piece);

        if(strlen($groups[$current_group]) + $piecelen > 5000) {
            // Adding the next piece whole would go over the limit,
            // figure out what to do.
            if($cur_piece[0] == '<') {
                // Tag goes over the limit, just put it into a new group
                $groups[++$current_group] = $cur_piece;
            } else {
                // Non-tag goes over the limit, split it and put the
                // remainder back on the list of un-grabbed pieces
                $grab_amount = 5000 - $strlen($groups[$current_group];
                $groups[$current_group] .= substr($cur_piece, 0, $grab_amount);
                $groups[++$current_group] = '';
                array_unshift($pieces, substr($cur_piece, $grab_amount));
            }
        } else {
            // Adding this piece doesn't go over the limit, so just add it
            $groups[$current_group] .= $cur_piece;
        }
    }
    return $groups;
}

另请注意，这可以在常规单词的中间拆分 - 如果您不想那样，请修改以 //Non-tag goes over the limit 开头的部分以选择一个$grab_amount 的值(value)更高。我没有费心编写代码，因为这只是一个如何绕过拆分标签的示例，而不是一个直接解决方案。