Question

我所拥有的是一个包含HTML和Text的字符串，也是一个搜索词。我想得到一些裁剪的文字＆＃34;周围＆＃34; $ searchword。

示例文字：

Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. <sometag>At</sometag> vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.

如果$ searchword是＆＃34; vero＆＃34;

，则输出

...sed diam voluptua. At <strong>vero</strong> eos et accusam et...

所以我想要在不包括HTML的搜索词之前和之后使用X字符。我不知道如何开始。我知道我们需要一个substr函数和一个正则表达式，但我被卡住了。

Answer 1

// The string to search in
$text = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis ex.';

// The text to search
$search_query = 'consectetur';

// The regular expression
// Note that I’m using preg_quote() to make sure the text doesn’t conflict with the regular expression
// This expression matches 3 words (punctuation included) before and after the searched keyword
$search = '/((\w+[^\w]+){3})(' . preg_quote($search_query) . ')(([^\w]+\w+){3})/i';

// Find all matches of the expression, and store it in $matches
preg_match($search, $text, $matches);

// Use the results to generate the string you desire.
$result = sprintf('...%s<strong>%s</strong>%s...', $matches[1], $matches[3], $matches[4]);

Answer 2

蒂姆的解决方案运行正常，但这里有一个稍微不同的解决方案，匹配前面的m个字符和给定单词后面的n个字符而不是n个单词：

$string = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. <sometag>At</sometag> vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.";
$string = strip_tags($string); // strip html tags
$word = 'vero';
$replace = "<strong>$word</strong>";
$before = 22; // characters to match before word
$after = 7; // characters to match after word

preg_match('/(.){'.$before.'}'.$word.'(.){'.$after.'}/', $string, $matches);

echo '...' . preg_replace('/'.$word.'/', '<strong>'.$word.'</strong>', $matches[0]) . '...';
// returns "...sed diam voluptua. At <strong>vero</strong> eos et..." for $before = 22 and $after = 7

Answer 3

第1步：删除HTML标记。第2步：包装搜索词出现次数。

$text = 'Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. <sometag>At</sometag> vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.';

$plainText = strip_tags($text);

$resultText = str_replace($searchword, '<strong>' . $searchword . '</strong>', $plainText);

如何裁剪除HTML标签之外的搜索词周围的文本

3 个答案: