php - What are the most valuable certification available for Programming? -

I would like to know what are the certificates available for programming, such as

• PHP for
• SAN authentication for Java

What are the other? Javascript? C ++? Python? Etc ...

Please give me some suggestions for other available certifications The most valuable thing for the developer: It is able to show that you can change the requirements and work in the maintenance software.

Certificates are usually very few, except for a pity that demands them (or at least ask, as long as they leave and someone who practices before the piece of paper).