How can regular expressions (regex) be effectively used in PHP for parsing and extracting specific information from code comments?

Regular expressions can be effectively used in PHP to parse and extract specific information from code comments by defining patterns that match the desired information within the comments. By using regex, you can easily search for and extract data such as author names, dates, or specific keywords within code comments. 

$code = file_get_contents('example.php');
$pattern = '/\/\/\s*TODO:\s*(.*)/i'; // Match TODO comments
preg_match_all($pattern, $code, $matches);

foreach ($matches[1] as $todo) {
    echo "TODO: " . $todo . "\n";
}

Keywords

regular expressions regex PHP parsing code comments

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