Does PHP work?

Yes, it does. PHP Version 5.6.40

To run the Animated Gif script, you need GD enabled in PHP.
Current GD status:

• GD support: yes
• GD Version: bundled (2.1.0 compatible)
• FreeType Support: yes
• FreeType Linkage: with freetype
• T1Lib Support: no
• GIF Read Support: yes
• GIF Create Support: yes
• JPEG Support: yes
• PNG Support: yes
• WBMP Support: yes
• XPM Support: yes
• XBM Support: yes
• WebP Support: no
• JIS-mapped Japanese Font Support: no

If you don't see "Yes, it does." above, then PHP is not enabled.