strpos with regular expression?

[phlow]

Is there a PHP function like strpos(string haystack, string needle) but where needle is not a string, but a regular expression? I couldn't find one 🙁

What I want to do is to extract a substring that is enclosed by two regular expression matches. Like this:

function myfunc($regex1, $regex2, $string) {
 // I don't know this part...
}

$mystring0 = "[Value0]foo0[/Value0]";
$mystring1 = "[Value1]foo1[/Value1]";
myfunc("[Value.]", "[/Value.]", $mystring0); // should return "foo0"
myfunc("[Value.]", "[/Value.]", $mystring1); // should return "foo1"

Thanx for your replies,
phlow

[herve]

The preg_match() function :

preg_match("/<title>(.*)<\/title>/i", $html_content, $match);