How php converts json data to array types

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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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