If we replace our *int type with the JSONInt type (not a pointer) the UnmarshalJSON () method will get called whenever we parse some JSON into a Blog object, giving us an opportunity to handle that portion of the unmarshalling with our custom code.
#Php json decode returns null how to#
How to determine if a JSON key has been set to null or not? Once the JSON file data is read and available in the form of string, then it becomes easy to decode JSON data into array. In the above code, the “ studJson.json ” depicts the JSON file whose data is to be read. This function reads the contents of the given file to a string. How to read and decode JSON files in PHP? If no error occured it will be JSON_ERROR_NONE.
#Php json decode returns null code#
It will return error code of the last encode/decode operation. So you should use another function – json_last_error.
Just testing result of json_decode is not enough because you should test it with NULL, but valid JSON could be like this ‘null’ and it will evaluate to NULL. If you’re pulling the JSON from a source other than a PHP variable, it would be wise to “trim” it first: $jsonData = trim($jsonData) How to test the result of JSON decode? If there is any string padding surrounding your JSON string, json_decode will return NULL. When does JSON _ decode return NULL in PHP?
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