$re = '/\[\[[\d\D]*?]]/';
$str = 'blablablabla[["<strong>LA DEFENSE 4 TEMPS ( La Rotonde )</strong><br />Centre commercial LES 4 TEMPS",
48.89141725,
2.23478235,
"4T"],
["<strong>ANGERS</strong><br />Centre commercial GEANT",
48.89141725,
2.23478235,
"4T"]]blablablabla';
preg_match_all($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