使用php获取类似搜索引擎的搜索正文片段

如果你不想像battal建议的那样突出关键词,并且想截取相关段落/内容,我会这样做:

$snippets = array();
foreach ($matches as $i => $match) {
    $pos = strpos($match, $searchTerm);

    $buffer = 30; // characters before and after the search term is found
    // start index - 0 or 30 characters before instance of search term
    $start = ($pos - $buffer >= 0) ? $pos - $buffer : 0;
    // end index - 30 characters after instance of search term or the length of the match
    $end = $start + strlen($searchTerm) + $buffer;
    $end = ($end >= strlen($match)) ? strlen($match) : $end;

    $snippets[$i] = substr($match, $start, $end);
}

你的意思是搜索突出显示:

str_replace(
    $searchTerm,  
    '<span class="searchHighlight">'.$searchTerm.'</span>',
    $searchString);

你需要用纯文本来做,否则你可能会遇到一些复杂的问题,如一篇单列文章中提到的 Enhance Usability by Highlighting Search Terms ;