An old-school way to do it is to:

1. Initialize an array at the start of each row;
2. Initialize a processing flag to false at the start of each row;
3. Push each cell into that array as it is processed during the inner loop;
4. Set the processing flag to true when you have your $patternmatch;
5. At the bottom of the row loop, after processing all the cells in that row, if the flag is set, the array contains the complete row so use it accordingly.