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In this article Xiaobian for you to introduce in detail "PHP how to parse JSON data", the content is detailed, the steps are clear, the details are handled properly, I hope this "PHP how to parse JSON data" article can help you solve your doubts, following the editor's ideas slowly in-depth, let's learn new knowledge.

What is JSON?

JSON is a standard lightweight data exchange format that can be parsed and generated quickly and easily.

Like XML, JSON is a text-based format that is easy to write and understand, but unlike XML, JSON data structures consume less bandwidth than the XML version. JSON is based on two basic structures:

Objects: defined as a collection of key / value pairs (that is, key:value). Each object begins with a left brace "{" and ends with a right brace "}". Multiple key / value pairs are separated by commas.

Array: defined as an ordered list of values that begins with a left parenthesis "[" and ends with a closing parenthesis "]", with values separated by commas ",".

In JSON, the key is always a string and the value can be string, number,true or false,null or even object or array. Strings must be enclosed in double quotation marks and can contain escape characters such as\ n,\ t, and\. The JSON object might look like this:

{"book": {"name": "PHP from entry to mastery", "author": "tomorrow Technology", "year": 2017, "type": "php programming", "bestseller": true}}

An example of the JSON array is as follows:

{"fruits": ["Apple", "Banana", "Strawberry", "Mango"]} encode JSON data in PHP

In PHP, the json_encode () function is used to encode values into JSON format. The encoded value can be any PHP data type other than a resource, such as a database or file handle. The following example shows how to encode an PHP associative array as a JSON object:

/ / associative array $marks = array ("Peter" = > 65, "Harry" = > 80, "John" = > 78, "Clark" = > 90); echo json_encode ($marks)

Similarly, you can encode an PHP indexed array as an JSON array, for example:

/ / indexed array $colors = array ("red", "green", "blue", "orange", "yellow"); echo json_encode ($colors)

You can also use the JSON_FORCE_OBJECT option to force the json_encode () function to return the PHP indexed array as a JSON object, as shown in the following example:

/ / indexed array $colors = array ("red", "green", "blue", "orange"); echo json_encode ($colors, JSON_FORCE_OBJECT); decode JSON data with PHP

Decoding JSON data is as simple as encoding it. You can use the PHP json_decode () function to convert the JSON-encoded string to the appropriate PHP data type.

Now let's look at an example that will show you how to decode JSON data and access various elements of a JSON object or array in PHP.

You can also use the foreach () loop to traverse the decoded data, as shown below:

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