$re = '/(?:(?<=\{)|(?<=andmark)\s+)([\'"])((?>[^\'"]+)\1?)\1(?=\s+andmark|\})/';
$str = '{\'Born\': {\'(1991-09-05) September 5, 1991 (age\\xa025)\\nSebastian, Florida, U.S.\'}, \'Weight\': {\'185 lbs\'}, \'Favorite maneuvers\': {\'Airs and “barrels\'}, \'Height\': {\'5\\\'9"\'...Lost, Erik Arakawa\'}, \'there is table\': {\'true\'}, \'Website\': {\'http://islandtocity.com/\' andmark \'hello\'}, \'exceptional_header_count\': {\'0\'}}
';
preg_match_all($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