$re = '/(?ix)
([^\d]+) # Person\'s Name
(.*(?:st|av|blvd|rd))\.?\h* # Number and Street
(.*?),?\h* # City
([A-Z]{2}),?\h* # State
(\d+) #Zip code/';
$str = 'Frank Conte 2133 Elm St. Gainesville, FL, 45679.
Frank F. Conte 123 First Rd. New York NY, 12345.
Frank Conte 2133 Elm blvd Gainesville fl, 45679.
Frank Conte 2133 Elm av Gaines Town, FL, 45679';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php