So let's say I'm given the following lines
[duration] => 92 [from] => 18884541236 [to] => 17841234568
What I want to be able to do is search the entire file to see any instances where the [from] number is the same as the [to] number.
So if I have an entry that looks like this
[duration] => 43 [from] => 17873332222 [to] => 17873332222
I can search the file for where the [from] number is immediately followed in the next line by an identical [to] number.