If condition for 3 variable

I'm having 3 variables.

+----------+---------+-------+---------+
|    a     |    b    |   c   | output  |
+----------+---------+-------+---------+
|    0     |    0    |   0   |    1    |
|    0     |    0    |   1   |    1    |
|    0     |    1    |   0   |    1    |
|    1     |    0    |   0   |    1    |
|    0     |    1    |   1   |    0    |
|    1     |    0    |   1   |    0    |
|    1     |    1    |   0   |    0    |
|    1     |    1    |   1   |    0    |
+----------+---------+-------+---------+

I want to apply this operation in If condition in PHP. That should be fastest one. So make it simple.

Note: Last condition(1,1,1) result 1, also no problem for me.