What's more efficient ? Fetching text from SQL database using PHP or from JSON file using Angular JS?

I'm developing a backend interface to let my client update the text in their website.

Given that there's only limited and fixed amount of areas to edit. What's more efficient (in terms of end-user speed and development/debugging) for this situation?

1. Storing and Fetching text from SQL database using PHP
2. Storing and Fetching text from JSON file using Angular JS