Social Share Integration for Image Gallery

I'm looking for a skilled developer to fix social media sharing functionality to my custom PHP based HTML/CSS website's image gallery. Usually, I was able to generate a link to Facebook sharer that picked up that exact picture. It's no more working properly. I want users to be able to share individual pictures on platforms like Facebook using the link I'll provide.

Key Requirements:
- Integrated social media sharing buttons for individual images fixing
- Ensure seamless functionality on all browsers and devices
- Maintain current design and aesthetics of the gallery

Ideal Skills and Experience:
- Proficiency in PHP language
- Proficiency in HTML/CSS
- Experience with social media integration
- Strong attention to detail and design consistency