How can regular expressions, such as preg_split, be effectively utilized in PHP to search for specific patterns or keywords within text data for processing?

Regular expressions, such as preg_split in PHP, can be effectively utilized to search for specific patterns or keywords within text data for processing by using the pattern matching capabilities of regular expressions. This allows for more complex and flexible text processing tasks, such as splitting a string based on a specific delimiter or extracting certain information from a text block.

$text = "Hello, this is a sample text with some keywords like PHP, regex, and preg_split.";
$keywords = preg_split("/[\s,]+/", $text);

foreach ($keywords as $keyword) {
    echo $keyword . "\n";
}