If your iPhone photos are indeed gone, I would suggest you try using iTunes in order to restore your iPhone data (including photos)from the last time you last sycned your iPhone with your iTunes. Here is about how to recover photos from iPhone.
Here are two easy methods to recover deleted photos from iPhone
One. Recover photos from iPhone yourself via iTunes:
1. Connect your iPhone with iTunes on computer
2. Right-click or control-click on the iPhone icon under iDevice on iTunes
3. Select "Restore from Backup" from the given options
4. After it finishes, your SMS are back to your iPhone
Important Note: This works only if you have made a backup for your photos on iTunes.
Two. Recover photos from iPhone by using third party iPhone Photo Recovery programe
If you have no backup for your photo, you can download iPhone Photo recovery software in order to overcome the problem and restore iPhone photo loss. Still you have not recovered lost photo from iPhone, some on-line applications also available which can be helpful in restoring precious photo details, probably will be able to find the solution to some extent.