You can bring your handheld with you on your daily commute and use a DOC or iSilo reader to brush up on your PHP knowledge, or just use it as a quick reference.
For owners of Palm-compatible handhelds, the Palm document and iSilo formats are ideal for this platform. You can bring your handheld with you on your daily commute and use a DOC or iSilo reader to brush up on your PHP knowledge, or just use it as a quick reference.