正则表达式在第一次出现时停止

Question

I have a string like so {!Hello} there, {!World}. I need to match {!Hello} and {!World} and I have my regex like so

$text = '{!Hello} there, {!World}';
preg_match_all("/\{\!.+\}/",$text,$var);

The problem is it matches the whole thing from beginning to end. That obviously means it's not stopping at the first occurrence of } but rather the last one. How can I match those?

EDIT: Forgot to mention I can't use \w+ because the word in between the brackets may contain special characters. IT may be something like {![e-mail]__IsInvalid}. I need to match this whole thing

Answer 1

You basically need to match ungreedy:
/\{\!.+?\}/

$text = '{!Hello} there, {!World} foo {![e-mail]__IsInvalid}';
preg_match_all("/\{\!.+?\}/",$text,$var);
print_r($var);

You could also add the U modifier (note it's uppercase):
/\{\!.+\}/U

$text = '{!Hello} there, {!World} foo {![e-mail]__IsInvalid}';
preg_match_all("/\{\!.+\}/U",$text,$var);
print_r($var);