How php converts json to array type

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In php, you can use the json_decode () function to convert json data to an array type, and you only need to specify that the second parameter of the function is a Boolean value "true" to decode the JSON value into an associative array; the syntax format is "json_decode ($json, true)".

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

PHP json_decode () function

The json_decode () function converts a JSON-encoded string to the appropriate PHP data type. By default, the json_decode () function returns an object.

Output result:

However, you only need to specify that the second parameter of the function is a Boolean value "true" to decode the JSON value into an associative array.

Output result:

Let's take a look at the basic syntax of the json_decode () function:

Json_decode ($json, $assoc = FALSE, $depth = 512, $options = 0)

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.

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

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

Options: 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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