regex - php preg_match with multiple patterns -

i have 2 patterns , want search them in string. this:

$pattern = '/,3$/' $pattern = '/^1,/';

actually want find strings start 1, or end ,3

my strings in format:

a => 1,2 b => 31,2 c => 4,3

for example , c matches!
how can use preg_match check patterns?
tanks helps.

try way

preg_match("/^1,|,3$/", $string)

Braziel