$re = '/wanted\(.*{(.|\n)*}\n{2,}/';
$str = 'function someFunc() {
const a = 6;
if (a === 7) {
while (true) {
break;
}
}
}
wanted()
function wanted() {
const a = 555;
if (a === 1) {
while (true) {
break;
}
}
}
function someFunc() {
const a = 6;
if (a === 7) {
while (true) {
break;
}
}
}';
preg_match_all($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