flags = 0:
{"glossary":{"title":"example glossary","GlossDiv":{"title":"S","GlossList":[{"ID":"SGML","SortAs":"SGML","GlossTerm":"Standard Generalized Markup Language","Acronym":"SGML","Abbrev":"ISO 8879:1986","GlossDef":"A meta-markup language, used to create markup languages such as DocBook.","GlossSeeAlso":["GML","XML","markup"]}]}}}

flags = JSON_C_TO_STRING_SPACED:
{ "glossary": { "title": "example glossary", "GlossDiv": { "title": "S", "GlossList": [ { "ID": "SGML", "SortAs": "SGML", "GlossTerm": "Standard Generalized Markup Language", "Acronym": "SGML", "Abbrev": "ISO 8879:1986", "GlossDef": "A meta-markup language, used to create markup languages such as DocBook.", "GlossSeeAlso": [ "GML", "XML", "markup" ] } ] } } }

flags = JSON_C_TO_STRING_SPACED|JSON_C_TO_STRING_PRETTY:
{
  "glossary": {
    "title": "example glossary",
    "GlossDiv": {
      "title": "S",
      "GlossList": [
        {
          "ID": "SGML",
          "SortAs": "SGML",
          "GlossTerm": "Standard Generalized Markup Language",
          "Acronym": "SGML",
          "Abbrev": "ISO 8879:1986",
          "GlossDef": "A meta-markup language, used to create markup languages such as DocBook.",
          "GlossSeeAlso": [
            "GML",
            "XML",
            "markup"
          ]
        }
      ]
    }
  }
}

flags = JSON_C_TO_STRING_SPACED|JSON_C_TO_STRING_PRETTY|JSON_C_TO_STRING_PRETTY_TAB:
{
	"glossary": {
		"title": "example glossary",
		"GlossDiv": {
			"title": "S",
			"GlossList": [
				{
					"ID": "SGML",
					"SortAs": "SGML",
					"GlossTerm": "Standard Generalized Markup Language",
					"Acronym": "SGML",
					"Abbrev": "ISO 8879:1986",
					"GlossDef": "A meta-markup language, used to create markup languages such as DocBook.",
					"GlossSeeAlso": [
						"GML",
						"XML",
						"markup"
					]
				}
			]
		}
	}
}