Jquery cross-origin request example sharing (jquery sends ajax requests) _ jquery

This article mainly introduces the jquery cross-origin request example (jquery sends ajax requests). For more information, see getJSON, which is commonly used in jQuery to call and obtain remote JSON strings, convert it to a JSON object. If the object is successfully converted, the callback function is executed. The prototype is as follows:

JQuery. getJSON (url, [data], [callback]) loads JSON data across domains.

Url: the address where the request is sent
Data: (optional) key/value parameter to be sent
Callback: (optional) callback function for successful Loading
It is mainly used by clients to obtain server JSON data. Simple Example:

The server script returns JSON data:

The Code is as follows:

// $. GetJSON. php
$ Arr = array ("name" => "zhangsan", "age" => 20 );
$ Jarr = json_encode ($ arr );
Echo $ jarr;

Note: first, use the PHP json_encode function to encode the data to be returned before returning to the client. Second, echo rather than return is returned to the client.

The core client code is as follows:

The Code is as follows: