捕获JSON 解析错误

$json = <<<JSON

{

    "origin":"Delhi",

    "destination":"London",

    "passengers":

    [

        {

            "name":"Mr. Perry Mason",

            "type":"Adult",

            "age":28

        },

        {

            "name":"Miss Irene Adler",

            "type":"Adult",

            "age":25

        }

    ],

    "travelDate":"17-Dec-2010"

}

JSON;

$objJson = json_decode($json);

switch(json_last_error())

{

    case JSON_ERROR_NONE:

        echo 'Travel date is:' . $objJson->travelDate;

    break;

    case JSON_ERROR_SYNTAX:

        echo 'Incorrect json : Please check your json syntax';

    break;

    case JSON_ERROR_CTRL_CHAR:

        echo 'Control character error';

    break;

    case JSON_ERROR_DEPTH:

        echo 'The json string has exceeded maximum allowed stack depth';

    break;

}