正则表达式忽略< script>标签 [英] Regex ignore matches between <script> tags

问题描述

我很抱歉，因为我对Regex知之甚少，甚至都不明白这个正则表达式在做什么（我没有写它 - source ），除了搜索特定术语的事实以便突出显示。

这是正则表达式：

  /（\ b $ | $ term 
 
 
 
 
 
 
 
 $ b 
问题是我需要确保它与< script> 和< / script> 标签。现在我知道脚本标记的写法有很多种变化，但我真正需要的是忽略< script 和 / script>< / code>考虑到脚本和< 之间的可能空格<脚本或 /脚本> 。
 
 
 
是否有人能够在此修改它办法？我将通知插件的作者谁写这个reg-ex包括在未来的版本。
 
 
 
 编辑：这是它的起源函数：  
 $ b $ 
  function relevanssi_highlight_terms（$ excerpt，$ query）{
 $ type = get_option（relevanssi_highlight）; 
 if（none== $ type）{
 return $ excerpt; 
} 
 
 switch（$ type）{
 casemark：//谢谢Jeff Byrnes 
 $ start_emp =< mark>; 
 $ end_emp =< / mark>; 
休息; 
案例strong：
 $ start_emp =< strong>; 
 $ end_emp =< / strong>; 
休息; 
 caseem：
 $ start_emp =< em>; 
 $ end_emp =< / em>; 
休息; 
 casecol：
 $ col = get_option（relevanssi_txt_col）; 
 if（！$ col）$ col =＃ff0000; 
 $ start_emp =< span style ='color：$ col'>; 
 $ end_emp =< / span>; 
休息; 
 casebgcol：
 $ col = get_option（relevanssi_bg_col）; 
 if（！$ col）$ col =＃ff0000; 
 $ start_emp =< span style ='background-color：$ col'>; 
 $ end_emp =< / span>; 
休息; 
 casecss：
 $ css = get_option（relevanssi_css）; 
 if（！$ css）$ css =color：＃ff0000; 
 $ start_emp =< span style ='$ css'>; 
 $ end_emp =< / span>; 
休息; 
 caseclass：
 $ css = get_option（relevanssi_class）; 
 if（！$ css）$ css =relevanssi-query-term; 
 $ start_emp =< span class ='$ css'>; 
 $ end_emp =< / span>; 
休息; 
默认值：
返回$摘录; 
} 
 
 $ start_emp_token =* [/; 
 $ end_emp_token =\] *; 
 
 if（function_exists（'mb_internal_encoding'））
 mb_internal_encoding（UTF-8）; 
 
 $ terms = array_keys（relevanssi_tokenize（$ query，$ remove_stopwords = true））; 
 
 $ phrases = relevanssi_extract_phrases（stripslashes（$ query））; 
 
 $ non_phrase_terms = array（）; 
 foreach（$ phrase作为$ phrase）{
 $ phrase_terms = array_keys（relevanssi_tokenize（$ phrase，false））; 
 foreach（$ terms as $ term）{
 if（！in_array（$ term，$ phrase_terms））{
 $ non_phrase_terms [] = $ term; 
} 
} 
 $ terms = $ non_phrase_terms; 
 $ terms [] = $ phrase; 
} 
 
 usort（$ terms，'relevanssi_strlen_sort'）; 
 
 get_option（'relevanssi_word_boundaries'，'on'）=='on'？ $ word_boundaries = true：$ word_boundaries = false; 
 foreach（$ terms as $ term）{
 $ pr_term = preg_quote（$ term，'/'）;如果（$ word_boundaries）{
 $ excerpt = preg_replace（/（\ b $ pr_term | $ pr_term\b）（？！（[^ <+））>>）/ iu，$ start_emp_token。'\\1'。$ end_emp_token，$ excerpt）; 
} 
 else {
 $ excerpt = preg_replace（/（$ pr_term）（？！（[^ <+））>>）/ iu，$ start_emp_token。'\\ \\\1'。$ end_emp_token，$ excerpt）; 
} 
 //感谢http://pureform.wordpress.com/2008/01/04/matching-a-word-characters-outside-of-html-tags/ 
} 
 
 $摘录= relevanssi_remove_nested_highlights（$摘录，$ start_emp_token，$ end_emp_token）; 
 
 $ excerpt = str_replace（$ start_emp_token，$ start_emp，$ excerpt）; 
 $ excerpt = str_replace（$ end_emp_token，$ end_emp，$ excerpt）; 
 $ excerpt = str_replace（$ end_emp。$ start_emp，，$ excerpt）; 
 if（function_exists（'mb_ereg_replace'））{
 $ pattern = $ end_emp。 '\s *'。 $ start_emp; 
 $ excerpt = mb_ereg_replace（$ pattern，，$ excerpt）; 
} 
 
 return $摘录; 
 
  
 
 
解决方案
既然 lookbehind assertions 需要固定长度，你不能用它们来寻找前面的在搜索到的字词之前< script> 标记某处。 
 
 
因此，在您替换所有字词的所有匹配项后，您需要第二次回复才能恢复出现在字词中的修饰字词 < script> 标记。 
 
 
 ＃提供一些示例数据
 $摘录='我的名字是bob！ 
 
鲍勃很酷。 
 
< script type =text / javascript> 
 var bobby =即使您已经在script标签内标记了术语< em> bob< / em>，它也能正常工作。; 
 alert（bobby）; 
 
 var bob = 5; 
< / script> 
 
是的，bob这个词很好。 
 
 $ start_emp_token ='< em>'; 
 $ end_emp_token ='< / em>'; 
 $ pr_term ='bob'; 
 
＃取代所有内容（不在标签中）
 $ excerpt = preg_replace（/（\ b $ pr_term | $ pr_term \b）（？！（[^ <]] +）？>）/ iu，$ start_emp_token。'$ 1'。$ end_emp_token，$ excerpt）; 
 
＃取消一些替换
 $ excerpt = preg_replace_callback（'＃（< script（？：[^>] *）>）（。*？）（< / script>）＃是'，
 create_function（
'$ matches'，
'global $ start_emp_token，$ end_emp_token，$ pr_term; 
 return $ matches [1] .str_replace （$ start_emp_token $ pr_term $ end_emp_token，$ pr_term，$ matches [2]）。$ matches [3];'
），
 $ excerpt）; 
 
 var_dump（$ excerpt）; 
  
以上代码产生以下输出：
 
 
 < 
 $ b< em> bob< / em>很酷。 
 
< script type =text / javascript> 
 var bobby =即使您已经标记术语< em> bob< / em> ; 
 alert（bobby）; 
 
 var bob = 5; 
< / script> 
 
是的，单词< em> bob< / em>正常工作。 
  

I apologise as I have very little knowledge about Regex and I don't even understand exactly what this regex is doing (I didn't write it - source) apart from the fact it searches for a certain term so that it can be highlighted.

Here is the Regex:

/(\b$term|$term\b)(?!([^<]+)?>)/iu

The problem is I need to make sure it doesn't match anything between <script> and </script> tags. Now I know there are many variations of how a script tag can be written but really all I need it to do is ignore any text between <script and /script> taking into account possible whitespace between script and < like < script or /script >.

Is anyone able to modify it in this way? I will notify the plugin's author who wrote this reg-ex for inclusion in future releases.

Edit: Here is the function it originates from:

function relevanssi_highlight_terms($excerpt, $query) {
    $type = get_option("relevanssi_highlight");
    if ("none" == $type) {
        return $excerpt;
    }

    switch ($type) {
        case "mark":                        // thanks to Jeff Byrnes
            $start_emp = "<mark>";
            $end_emp = "</mark>";
            break;
        case "strong":
            $start_emp = "<strong>";
            $end_emp = "</strong>";
            break;
        case "em":
            $start_emp = "<em>";
            $end_emp = "</em>";
            break;
        case "col":
            $col = get_option("relevanssi_txt_col");
            if (!$col) $col = "#ff0000";
            $start_emp = "<span style='color: $col'>";
            $end_emp = "</span>";
            break;
        case "bgcol":
            $col = get_option("relevanssi_bg_col");
            if (!$col) $col = "#ff0000";
            $start_emp = "<span style='background-color: $col'>";
            $end_emp = "</span>";
            break;
        case "css":
            $css = get_option("relevanssi_css");
            if (!$css) $css = "color: #ff0000";
            $start_emp = "<span style='$css'>";
            $end_emp = "</span>";
            break;
        case "class":
            $css = get_option("relevanssi_class");
            if (!$css) $css = "relevanssi-query-term";
            $start_emp = "<span class='$css'>";
            $end_emp = "</span>";
            break;
        default:
            return $excerpt;
    }

    $start_emp_token = "*[/";
    $end_emp_token = "\]*";

    if ( function_exists('mb_internal_encoding') )
        mb_internal_encoding("UTF-8");

    $terms = array_keys(relevanssi_tokenize($query, $remove_stopwords = true));

    $phrases = relevanssi_extract_phrases(stripslashes($query));

    $non_phrase_terms = array();
    foreach ($phrases as $phrase) {
        $phrase_terms = array_keys(relevanssi_tokenize($phrase, false));
        foreach ($terms as $term) {
            if (!in_array($term, $phrase_terms)) {
                $non_phrase_terms[] = $term;
            }
        }
        $terms = $non_phrase_terms;
        $terms[] = $phrase;
    }

    usort($terms, 'relevanssi_strlen_sort');

    get_option('relevanssi_word_boundaries', 'on') == 'on' ? $word_boundaries = true : $word_boundaries = false;
    foreach ($terms as $term) {
        $pr_term = preg_quote($term, '/');
        if ($word_boundaries) {
            $excerpt = preg_replace("/(\b$pr_term|$pr_term\b)(?!([^<]+)?>)/iu", $start_emp_token . '\\1' . $end_emp_token, $excerpt);
        }
        else {
            $excerpt = preg_replace("/($pr_term)(?!([^<]+)?>)/iu", $start_emp_token . '\\1' . $end_emp_token, $excerpt);
        }
        // thanks to http://pureform.wordpress.com/2008/01/04/matching-a-word-characters-outside-of-html-tags/
    }

    $excerpt = relevanssi_remove_nested_highlights($excerpt, $start_emp_token, $end_emp_token);

    $excerpt = str_replace($start_emp_token, $start_emp, $excerpt);
    $excerpt = str_replace($end_emp_token, $end_emp, $excerpt);
    $excerpt = str_replace($end_emp . $start_emp, "", $excerpt);
    if (function_exists('mb_ereg_replace')) {
        $pattern = $end_emp . '\s*' . $start_emp;
        $excerpt = mb_ereg_replace($pattern, " ", $excerpt);
    }

    return $excerpt;
}

解决方案

Since lookbehind assertions need to be fixed in length, you cannot use them to look for a preceding <script> tag somewhere before the searched term.

So, after you replace all the occurrences of the desired term, you need a second pass to revert back those occurrences of the modified term that appear to be inside a <script> tag.

# provide some sample data
$excerpt = 'My name is bob!

And bob is cool.

<script type="text/javascript">
var bobby = "It works fine even if you already have tagged the term <em>bob</em> inside the script tag.";
alert(bobby);

var bob = 5;
</script>

Yeah, the word "bob" works fine.';

$start_emp_token = '<em>';
$end_emp_token = '</em>';
$pr_term = 'bob';

# replace everything (not in a tag)
$excerpt = preg_replace("/(\b$pr_term|$pr_term\b)(?!([^<]+)?>)/iu", $start_emp_token . '$1' . $end_emp_token, $excerpt);

# undo some of the replacements
$excerpt = preg_replace_callback('#(<script(?:[^>]*)>)(.*?)(</script>)#is',
                       create_function(
                         '$matches',
                         'global $start_emp_token, $end_emp_token, $pr_term;
                          return $matches[1].str_replace("$start_emp_token$pr_term$end_emp_token", "$pr_term", $matches[2]).$matches[3];'
                       ),
                       $excerpt);

var_dump($excerpt);

The code above produces the following output:

string(271) "My name is <em>bob</em>!

And <em>bob</em> is cool.

<script type="text/javascript">
var bobby = "It works fine even if you already have tagged the term <em>bob</em> inside the script tag.";
alert(bobby);

var bob = 5;
</script>

Yeah, the word "<em>bob</em>" works fine."

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