In JSON, keys are always strings, while a value can be a string, number, true or false, null or even the object or an array. Strings must be enclosed in the double quotes** “** and can contain escape characters such as \n, \t, *and *\.
JSON data structures are very similar to the PHP arrays. PHP programming language has built-in functions to encode and decode the JSON data. The most common JSON PHP functions are json_encode and json_decode, respectively. Both functions only work with UTF-8 encoded string data.
Decoding JSON data is as simple as encoding it. You can use a PHP json_decode() function to convert a JSON encoded string into the appropriate PHP data type. We will see how to decode or convert a JSON object to a PHP object.
Convert PHP Array to JSON. In this tutorial we’ll learn about the JSON format and how to convert PHP data structures into JSON. Convert PHP Object to JSON.