How can regular expressions be used effectively in PHP to achieve the desired highlighting of search terms?

To achieve the desired highlighting of search terms in PHP using regular expressions, you can use the `preg_replace` function to search for the search terms in a given text and wrap them with HTML tags for highlighting. By using regular expressions, you can search for the exact search terms while ignoring case sensitivity or variations in the text. 

$search_query = "example search term";
$text_to_highlight = "This is an example text containing the search term for demonstration purposes.";

$highlighted_text = preg_replace("/\b(" . preg_quote($search_query, "/") . ")\b/i", "<span style='background-color: yellow;'>$1</span>", $text_to_highlight);

echo $highlighted_text;

Keywords

Regular expressions PHP highlighting search terms achieve

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