Questions about PHP a piece of code, please expert guidance

A set of systems based on thinkphp3.1, using the MVC model
There is a section of code below that is the HTML file in the TPL,

{"Data": {"Total":
 
  , "page":
 
  , "songs": [
 
  {"id":
 
  , "createtime": "
 
  ", " Singer ":"
 
  "," Songname ":"
 
  "}
 
  ]," cur ":
 
  }," code ": 0," info ":" "}

Would you like to ask if the {} curly braces that surround the code represent the output variable? What do you mean by wrapping curly braces in curly braces? I would like to ask which aspect of the technology, I want to search this area of learning materials, thank you!

Reply to discussion (solution)

{} This is JSON code not PHP php just output string

All right, thanks, I'll find the information.

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