PHP/MySQL Social Integration

We're looking for a developer to help integrate our PHP/MySQL website with social media. Must use current social media functionality, not deprecated. In particular, we would like the postings to be triggered off of custom form submittals (not the standard plug-ins that the social media sites provide), incorporating user comments into the posts. There would be two forms that would post to a specific social site, and another form that would post to several social media sites with one submittal. This would be the first project of many for the right developer.