PHP智能文本片段高亮函数开发技术求助

Got it, let's solve this problem. The key issue with your original code is that it only does exact substring matches—we need a way to handle word inflections (like marry → married, mediate → mediated) while preserving the original text and wrapping matches in <b> tags.

Approach #

We'll use regular expressions to target common verb inflection patterns (present tense, past tense, present participle, third-person singular) and build a dynamic pattern from your search phrase. Then we'll use preg_replace_callback to safely wrap matching segments in bold tags.

Working Code #

function highlightInflectedPhrase(string $text, string $search): string
{
    // Trim and split search phrase into individual words
    $searchWords = preg_split('/\s+/', trim($search));
    if (empty($searchWords)) {
        return $text;
    }

    $patternParts = [];
    foreach ($searchWords as $word) {
        // Escape special regex characters in the search word
        $escapedWord = preg_quote($word, '/');

        // Build regex part to match common inflections
        if (preg_match('/y$/', $escapedWord)) {
            // Handle words ending in y (e.g., marry → married, marrying)
            $stem = substr($escapedWord, 0, -1);
            $patternParts[] = "$stem(y|i(es|ed|ing))";
        } elseif (preg_match('/e$/', $escapedWord)) {
            // Handle words ending in e (e.g., mediate → mediated, mediating)
            $stem = substr($escapedWord, 0, -1);
            $patternParts[] = "$stem(e|es|ed|ing)";
        } else {
            // Handle regular words (e.g., walk → walks, walked, walking)
            $patternParts[] = "$escapedWord(s|ed|ing)?";
        }
    }

    // Combine parts into a full regex pattern (case-insensitive, word boundaries)
    $pattern = '/\b(' . implode('\s+', $patternParts) . ')\b/i';

    // Replace matches with bold-wrapped text
    return preg_replace_callback($pattern, function($matches) {
        return '<b>' . $matches[0] . '</b>';
    }, $text);
}

// Test your examples
echo highlightInflectedPhrase("Regulation is mediated via many different mechanisms", "mediate via") . "\n";
// Output: Regulation is <b>mediated via</b> many different mechanisms

echo highlightInflectedPhrase("is mediated via many", "mediate via") . "\n";
// Output: is <b>mediated via</b> many

echo highlightInflectedPhrase("are meddling in local affairs.", "meddle in") . "\n";
// Output: are <b>meddling in</b> local affairs.

echo highlightInflectedPhrase("who can not get married in France.", "marry in") . "\n";
// Output: who can not get <b>married in</b> France.

How It Works #

1. Split Search Phrase: We break your search string into individual words to handle each term's inflections separately.
2. Build Inflection Patterns:
   • For words ending in y (like marry), we match both the original form and inflections where y becomes i (e.g., married, marrying).
   • For words ending in e (like mediate), we match the original form plus inflections that drop the e (e.g., mediating) or keep it (e.g., mediated).
   • For regular words, we match the original form plus common suffixes (s, ed, ing).
3. Regex Matching: We use word boundaries (\b) to ensure we match full words, not substrings, and case insensitivity (i) to handle capitalization differences.
4. Safe Replacement: preg_replace_callback lets us wrap the exact matched text (preserving original case/spelling) in <b> tags.

Limitations & Improvements #

• This handles common regular verb inflections but won't work for irregular verbs (e.g., go → went, eat → eaten). For those, you'd need a more advanced solution using natural language processing tools (like a stemming library or WordNet integration).
• If your text contains HTML tags, you might want to add a check to avoid wrapping tags themselves (the current code will ignore tags since we're matching word boundaries, but if tags are inside words, you'd need additional handling).

内容的提问来源于stack exchange，提问作者MaximShatohin