php数组中的奇怪错误

Question

I am trying to json encode an array,it does encode but i get lots of errors:

$products = array( array( Title => "rose", 
                      Price => "1.25,1.31,1.54,1.39",
                      Type => "dropdown"
                    ),
               array( Title => "daisy", 
                      Price => "0.75",
                      Type => "text_field",
                    ),
               array( Title => "orchid", 
                      Price => "1.15",
                      Type => "text_field"
                    )
             );
echo json_encode($products);

I get the following errors.

Notice: Use of undefined constant Title - assumed 'Title' in C:\wamp\www\serializer.php on line 2

Notice: Use of undefined constant Price - assumed 'Price' in C:\wamp\www\serializer.php on line 3

Notice: Use of undefined constant Type - assumed 'Type' in C:\wamp\www\serializer.php on line 4

Notice: Use of undefined constant Title - assumed 'Title' in C:\wamp\www\serializer.php on line 6

Notice: Use of undefined constant Price - assumed 'Price' in C:\wamp\www\serializer.php on line 7

Notice: Use of undefined constant Type - assumed 'Type' in C:\wamp\www\serializer.php on line 8

Notice: Use of undefined constant Title - assumed 'Title' in C:\wamp\www\serializer.php on line 10

Notice: Use of undefined constant Price - assumed 'Price' in C:\wamp\www\serializer.php on line 11

Notice: Use of undefined constant Type - assumed 'Type' in C:\wamp\www\serializer.php on line 12

Answer 1

You need to quote the keys. Without quotes, they're constants. The interpreter is guessing what you mean, but you should change it to avoid the notice.

$products = array( array( "Title" => "rose", 
                  "Price" => "1.25,1.31,1.54,1.39",
                  "Type" => "dropdown"
                ),