PHP Determines if it is a JSON data method

PHP Determines whether a variable data is JSON data, the first thing to remember is that Json_encode returns a string, and Json_decode returns an object. (plus true parameter returns an array)

The judgment data is not in JSON format:

function Is_not_json ($str) {     return Is_null (Json_decode ($STR));}

Determining data is a valid JSON data: (PHP version greater than 5.3)

function Is_json ($string) {json_decode ($string); return (json_last_error () = = Json_error_none);}

The Json_last_error () function returns errors that occur during data codec.

Note: The JSON codec operation string must be UTF8.

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