>>16
80 is ok. However, it's fucking pushing it. 76 gives you another indentation level before you hit the hard limit of 80. In decent and humane imperative languages (FIOC, JavaScript, See, Ruby) long lines are a code smell. Long lines are common in PHP as it is mostly coded by people who will happily shit on a floor, your floor.
There should be a punishment system for long lines that goes something like this:
1-72 Yeah! We rockin'!
72-76 Careful now. Maybe think about refactoring.
76-80 Oooh! You're pushing the limit there! you should
definitely think about refactoring.
80-90 A stern warning should be issued to the miscreant.
90-100 A written reprimand should be issued. For a second offence employment should be terminated.
100-120 Removal of fingers. This ``person'' should not code again.
120+ Removal of penis. This ``animal'' should not be allowed to breed.