Json

Type

Class

Namespace

craft\helpers

Inherits

craft\helpers\Json » yii\helpers\Json » yii\helpers\BaseJson

Since

3.0.0

Class Json

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Public Properties

Property	Description
jsonErrorMessages	array – List of JSON Error messages assigned to constant names for better handling of PHP <= 5.5.
keepObjectType	boolean – Avoids objects with zero-indexed keys to be encoded as array Json::encode((object)['test']) will be encoded as an object not as an array.
prettyPrint	boolean, null – Enables human readable output a.k.a.

Public Methods

Method	Description
decode()	Decodes the given JSON string into a PHP data structure.
decodeFromFile()	Decodes JSON from a given file path.
decodeIfJson()	Decodes the given JSON string into a PHP data structure, only if the string is valid JSON.
encode()	Encodes the given value into a JSON string.
errorSummary()	Generates a summary of the validation errors.
htmlEncode()	Encodes the given value into a JSON string HTML-escaping entities so it is safe to be embedded in HTML code.
isJsonObject()	Returns whether a string value looks like a JSON object or array.

decodeFromFile()

Since

4.3.5

Decodes JSON from a given file path.

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Arguments

• $file (string) – The file path
• $asArray (boolean) – Whether to return objects in terms of associative arrays

Returns

mixed – The JSON-decoded file contents

Throws

• yii\base\InvalidArgumentException
  if the file doesn’t exist or there was a problem JSON-decoding it

decodeIfJson()

Decodes the given JSON string into a PHP data structure, only if the string is valid JSON.

View source

Arguments

• $str (mixed) – The string to be decoded, if it's valid JSON.
• $asArray (boolean) – Whether to return objects in terms of associative arrays.

Returns

mixed – The PHP data, or the given string if it wasn’t valid JSON.

encode()

Encodes the given value into a JSON string.

The method enhances json_encode() by supporting JavaScript expressions. In particular, the method will not encode a JavaScript expression that is represented in terms of a \craft\helpers\JsExpression object.

Note that data encoded as JSON must be UTF-8 encoded according to the JSON specification. You must ensure strings passed to this method have proper encoding before passing them.

View source

Arguments

• $value (mixed) – The data to be encoded.
• $options (integer) – The encoding options. JSON_UNESCAPED_UNICODE is used by default.

Returns

string – The encoding result.

Throws

• yii\base\InvalidArgumentException
  if there is any encoding error.

isJsonObject()

Since

3.5.0

Returns whether a string value looks like a JSON object or array.

View source

Arguments

• $str (string)

Returns

boolean

Protected Methods

Method	Description
handleJsonError()	Handles encode() and decode() errors by throwing exceptions with the respective error message.
processData()	Pre-processes the data before sending it to json_encode().