DOM Source of Selection

Hi I am working on a project wherein i have to extract information from a webpage and use it for processing. However that information becomes available only when i manually select a part of the webpage and view its source information (DOM source of selection ). Now i want this to be automated . Is there any way in PHP by which i can directly refer to that particular DOM and load its source , say directly into a variable . Thank You. -- N.Harihara Krishnan B.Tech (III year ) CSE NIT Trichy