Writing JSON

The ease of working with JSON is one of the main reasons 0:00 it has become such a popular format for sharing data on the web. 0:03 We can take any object or array from PHP and turn it into a JSON 0:07 object that can then be shared without needing to rely on a particular language. 0:13 I can share the JSON for my recommendations and 0:18 they can be easily read using Python or any other language. 0:21 Communication is what has made the Internet such a powerful force. 0:26 Let's create another file in the inc directory. 0:30 We'll name this one 0:33 write_json [SOUND]. 0:38 We'll start by creating an array for the new book. 0:44 [SOUND] This time, 0:47 we'll be using the FormData from the Add book form. 0:56 And our array will be an associative array. 0:59 Our title will be filter_ 1:04 input(INPUT_POST, 'title, and 1:09 FILTER_SANITIZE_STRING.. 1:15 We'll copy this for link, book, image, book description, 1:21 pages, author, ISBN, rating and publish date. 1:26 Link, [SOUND] and 1:34 this will be a URL. 1:39 Our book_image_url, [SOUND] which will also be a URL. 1:46 [SOUND] 1:47 Our book_description, 1:49 [SOUND] number 1:58 of pages [SOUND] 2:03 which will be 2:08 a NUMBER_INT. 2:12 [SOUND] author_name, 2:18 [SOUND] isbn [SOUND] 2:24 which will be 2:29 a NUMBER_INT. 2:33 [SOUND] Our 2:38 average_rating [SOUND] 2:41 which will be 2:49 a number float. 2:53 And finally book_published. 2:58 [SOUND] And this will 3:05 also be a NUMBER_INT. 3:10 Once again, we need to get the contents of the JSON file and 3:17 use the JSON decode function to turn it into an object. 3:21 We'll be using this file a couple of times. 3:25 So we'll set this up as a variable. 3:27 Our file = ' 3:31 ../data/json/top_programming_books.json. 3:33 books 3:45 =json_decode(file_get_contents 3:46 and the file. 3:56 Next, let's make sure the object is as expected. 4:02 Is_object($books->collection->books, 4:09 and the first array item. 4:19 Now we can add the new book to our book collection. 4:31 Next, we can use the json_encode function to turn our object back into JSON. 4:45 Before we actually write this back to our file, 5:02 let's take a quick look at the JSON itself, by displaying it to the browser. 5:04 Make sure we use the pretags. 5:11 And let's preview this in the browser. 5:21 We're going to add a book. 5:24 I'm going to pull the information from good reads. 5:27 There's no ISBN, so I'll leave that blank. 6:07 And the publish date was 2016. 6:13 I wanna pull the smaller image. 6:15 And let's add the book. 6:31 We have the json but it's not the prettiest. 6:34 Let's add a couple options to our json encode function. 6:37 See the notes associated with this video for more available options. 6:41 We'll use 6:49 JSON_PRETTY_PRINT | 6:51 JSON_UNESCAPED_SLASHES. 6:57 Now, let's preview this again. 7:05 Much better. 7:09 Let's write this back to our file and finish by redirecting to the books page. 7:11 Let's comment out the echo. 7:18 file_put_contents, file and our json. 7:22 Header is location: /books.php. 7:33 Let's check out the final functionality in the browser. 7:38 We fill out a form, submit it, and now our book shows up. 7:45