c# - 将 PHP 正则表达式转换为 c# RegEx 模式

Question

我有一个小问题。我必须将正则表达式从 php 转换为 C#

\[(\[?)(blockquote)(?![\w-])([^\]\/]*(?:\/(?!\])[^\]\/]*)*?)(?:(\/)\]|\](?:([^\[]*+(?:\[(?!\/\2\])[^\[]*+)*+)\[\/\2\])?)(\]?)

但是我在 C# 中使用 regx 时遇到问题并得到这个错误

Match Pattern Error: parsing "[([?)(blockquote)(?![\w-])([^]/](?:/(?!])[^]/])*?)(?:(/)]|](?:([^[]+(?:[(?!/\2])[^[]+)*+)[/\2])?)(]?)" - Nested quantifier +.

请指教。

生成php正则表达式

[blockquote] some text... [/blockquote]

在 wordpress 中来自

function get_shortcode_regex() {
global $shortcode_tags;
$tagnames = array_keys($shortcode_tags);
$tagregexp = join( '|', array_map('preg_quote', $tagnames) );

// WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcode_tag()
// Also, see shortcode_unautop() and shortcode.js.
return
      '\\['                              // Opening bracket
    . '(\\[?)'                           // 1: Optional second opening bracket for escaping shortcodes: [[tag]]
    . "($tagregexp)"                     // 2: Shortcode name
    . '(?![\\w-])'                       // Not followed by word character or hyphen
    . '('                                // 3: Unroll the loop: Inside the opening shortcode tag
    .     '[^\\]\\/]*'                   // Not a closing bracket or forward slash
    .     '(?:'
    .         '\\/(?!\\])'               // A forward slash not followed by a closing bracket
    .         '[^\\]\\/]*'               // Not a closing bracket or forward slash
    .     ')*?'
    . ')'
    . '(?:'
    .     '(\\/)'                        // 4: Self closing tag ...
    .     '\\]'                          // ... and closing bracket
    . '|'
    .     '\\]'                          // Closing bracket
    .     '(?:'
    .         '('                        // 5: Unroll the loop: Optionally, anything between the opening and closing shortcode tags
    .             '[^\\[]*+'             // Not an opening bracket
    .             '(?:'
    .                 '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
    .                 '[^\\[]*+'         // Not an opening bracket
    .             ')*+'
    .         ')'
    .         '\\[\\/\\2\\]'             // Closing shortcode tag
    .     ')?'
    . ')'
    . '(\\]?)';                          // 6: Optional second closing brocket for escaping shortcodes: [[tag]]

Answer 1

嗯，根据this回答，.NET 不支持占有量词。

因此，您需要将 [0-9]*+ 等结构替换为 (?>[0-9]*)