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This article mainly explains "how php converts json data into array types". The content in the article is simple and clear, and it is easy to learn and understand. Please follow Xiaobian's train of thought to study and learn "how php converts json data into array types".

In php, you can use the json_decode () function to convert json data to an array type, simply by setting the second parameter of the function to "true", with the syntax "json_decode ($json, true)".

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use the json_decode () function to convert json data to an array type.

The json_decode () function converts a JSON-encoded string to the appropriate PHP data type.

By default, the json_decode () function returns an object

However, when the second parameter is specified as a Boolean true, the JSON value will be decoded as an associative array.

Description:

Json_decode-Decoding strings in JSON format

Syntax:

Json_decode (string $json, bool $assoc = false, int $depth = 512, int $options = 0): mixed

Take a JSON-encoded string and convert it to a PHP variable

Parameters: the json_decode () function accepts the four parameters described above, as follows:

Json: it contains the JSON string that needs to be decoded. It applies only to UTF-8-encoded strings.

$jassoc: it is a Boolean variable. If true, the returned object is converted to an associative array.

Jdepth: it represents the recursive depth specified by the user.

$joptions: it includes the bitmask of JSON_OBJECT_AS_ARRAY, JSON_BIGINT_AS_STRING,JSON_THROW_ON_ERROR.

Return value: this function returns the encoded JSON value with the appropriate PHP type. Returns NULL if json cannot decode or if the encoded data is deeper than the recursive limit.

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