JQuery serializes Ajax cross-origin serialization requests $. ajax

The most commonly used jquery + ajax method is $. post, which is a second encapsulation of $. ajax. Next let's take a look at the use of $. ajxa:

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$ ('# Ajax'). click (function (){ $. Ajax ({ Type: 'post ', Url: 'Test. Php ', DateType: 'HTML ', // supports htmlxmljsonjsonp Data: {domain: 'www .111cn.net ', keyword: 'php blog '}, Success: function (response, status, xhr ){ Console. log ('success: '+ response ); }, Error: function (response, status, xhr ){ Console. log ('Error: '+ response) } }); });

Here, for cross-origin operations on jsonp, refer to the article: php + jquery + jsonp cross-origin ajax implementation

When the form is submitted, there may be a lot of data. In that case, there will be a lot of parameters in data: {} and it is prone to errors, so we will use form serialization serialize ()

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$ ('. Btn'). click (function (){ $. Ajax ({ Type: 'post ', Url: 'Test. Php ', DateType: 'json', // supports htmlxmljsonjsonp Data: $ ('form'). serialize (), // success: {"user": "tuisiyuan", "email": "1054770532@qq.com "} // Data: $ ('form'). serializeArray (), // success: {"user": "tuisiyuan", "email": "1054770532@qq.com "} Success: function (response, status, xhr ){ Console. log ('success: '+ response ); }, Error: function (response, status, xhr ){ Console. log ('Error: '+ response) } }); });

Screenshot of serialize in php:

Screenshot of serializeArray in php:

From the above, we can see that there is basically no difference between serialize and serializeArray in the processing of data on the php side.

Another less commonly used but useful method is the ajax data initialization method: $. ajaxSetup initializes repeated data.

$. AjaxSetup ({// initialize common data so that the code does not repeat too much

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Type: 'post ', Url: 'Test. Php' });

Supplement: jsonp implements ajax cross-origin requests

First, load the following code under a local domain name:

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<Scripttype = "text/javascript" src = "http://www.lshop.com/js/test.js"> </script> Then I pasted the jsonp code in the js test. js in www.lshop.com: $. Ajax ({ Type: "get ", Async: false, Url: 'http: // www.111cn.net/index. Php ', DataType: "jsonp ", // Jsonp: "callback", // The parameter name that is passed to the request handler or page to obtain the jsonp callback function name (usually the default value is callback) JsonpCallback: "flightHandler", // The function that needs to wrap the returned data when returning a value in php Success: function (json ){ Alert ('My keywords are: '+ json. stitle ); }, Error: function (){ Alert ('fail '); } });

Php code:

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$ A = json_encode (array ('title' => 'It blog ', 'stitle' => 'javascript blog ')); Echo "flightHandler ($ )"; Exit;

The result is: pop-up-my keyword is: javascript blog.