How can one ensure that preg_match_all captures all desired patterns in a string?

To ensure that preg_match_all captures all desired patterns in a string, you should make sure that your regular expression is correctly written to match all possible patterns. Additionally, you should check the output of preg_match_all to see if it captures all the desired patterns.

$string = "The quick brown fox jumps over the lazy dog";
$pattern = "/\b\w{4}\b/";
preg_match_all($pattern, $string, $matches);

print_r($matches[0]);