regular expression matchinf for first occurrence

Question

I have a text's

case 1 :push ($arr, $var1);
case 2 : push $arr, $var1, $var2;
case 3 push ($arr, $var1, $var2);

I need to grep out capture it as $1=push ( and $2 as $arr and $3 as , $var1, $var2); for case 3

i tried it as

 /(.*push.*)(\$.*)(,.*)/

and /(.*push.*)(\$.*)([^,]*)/ but it's not working for all the cases properly

Answer 1

(push.*?)(\$\w+)(,.*)

it works