How can one extract all elements that match a specific pattern in a string using PHP?

To extract all elements that match a specific pattern in a string using PHP, you can use the preg_match_all function along with regular expressions. Regular expressions allow you to define a pattern that describes the desired elements you want to extract from the string. The preg_match_all function will then return an array containing all the matches found in the string. 

$string = "The quick brown fox jumps over the lazy dog";
$pattern = '/\b\w{4}\b/'; // Match four-letter words

preg_match_all($pattern, $string, $matches);

print_r($matches[0]);

Keywords

Regular expressions preg_match_all pattern matching string manipulation PHP functions

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