PHP - preg_match for (string),(string),

PHP - preg_match for (string),(string),

This is my string:
(name1=value1),(name1=value1a,value1b,value1c),(name2=value2),...
I want the strings that are inside the parentheses. Means these:
name1=value1
name1=value1a,value1b,value1c
name2=value2
and etc...Note that inside the parentheses can be ANY character except (
and ).