Сергей Мельников

var str = "слово1 слово2 [слово слово слово] слово3";
var result = [];
str.replace(/(\[.+?\]|\S+)/g, function(m) {
  result.push(m);
  return "";
})
console.log("Result:", result)
// ["слово1", "слово2", "[слово слово слово]", "слово3"]

/([\d\w]+)\(([\d\w]+)=([\d\w]+)\)/.exec("abcd(efgi=klmn)");
/* ["abcd(efgi=klmn)", "abcd", "efgi", "klmn"] */

$grab_date = '2014-03-05';
preg_match("/\d\d\d\d\W\d\d\W\d\d/", $grab_date, $matches);

print_r($matches); // Array ( [0] => 2014-03-05 )