Create JSON object using PHP

Question

How can I achieve or create this type JSON object using PHP?

{ 
    \"label\": \"Devices per year\",
    \"data\": [
        [1999, 3.0], [2000, 3.9], [200         


        

Answer 1

Try using this

$arrayDateAndMachine = array(   array("1999","3.0"), 
                                array("2000","3.9")
                                );