$re = '/this\.dialogs = {.*};/s';
$str = ' this.dialogs = {
errorDialogComponent: ko.observable(),
searchIndividualsDialogComponent: ko.observable(),
searchAccountsDialogComponent: ko.observable(),
addBlocksDialogComponent: ko.observable(),
deleteBlocksDialogComponent: ko.observable(),
folioGroupDialogComponent: ko.observable(),
groupServicesOverviewDialogComponent: ko.observable(),
roomingListDialogComponent: ko.observable()
};';
preg_match_all($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