How to use ^/$ if it's already used as a delimiter for regex in PHP?

Question

$regex = \'$....$\'

$regex = \'^...^\'

In the above two cases,how to use ^/$ to match the beginning/end of a string?

Answer 1

just do escaping ?

$str='^...^';
preg_match("/^\^.*\^$/",$str,$matches);
print_r($matches);