$.getjson cross-domain AJAX requests based on jquery

My back end is a PHP tutorial, the following code is mainly implemented a function is to provide an appointment registration interface, need to pass the data are: User name, contact telephone number and address

View Sourceprint?......

The code is as follows

Copy Code

View sourceprint?/* Appointment Registration Implementation Interface * * Case "Yuyue_interface": $name = Trim ($_get[' name ')); $phone = Trim ($_get[' phone ']); $addr = Trim ($_get[' addr ']); $DT = Date ("y-m-d h:i:s"); $CB = $_get[' callback ']; if ($name = = "" | | $name = = NULL) { echo $CB. " ({code: ". Json_encode (1)."}); }elseif ($phone = = "" | | $phone = = NULL) { echo $CB. " ({code: ". Json_encode (2)."}); }elseif ($addr = = "" | | $addr = = NULL) { echo $CB. " ({code: ". Json_encode (3)."}); }else{ $db->execute ("INSERT INTO Tb_yuyue" (Realname,telphone,danwei,dt,ischeck) VALUES (' $name ', ' $phone ', ' $addr ', ' $dt ', 0) "); echo $CB. " ({code: ". Json_encode (0)."}); } Exit Break

View Sourceprint?......

And then the front end is handled.

The code is as follows

Copy Code

View sourceprint?$ (document). Ready (function () { The following 3 parameters required for an appointment registration var name = "Name"; varchar type with a maximum length of 8 digits (4 characters) var phone = "Phone"; varchar type, 11-bit length var addr = "Addr"; varchar type with a maximum length of 500 digits (250 characters) $.getjson ("http://request Web address/data.php?ac=yuyue_interface&name=" +name+ "&phone=" +phone+ "&addr=" +addr+ " &callback=? ", function (data) { if (data.code==1) { Custom code Alert ("Name cannot be blank"); }else if (data.code==2) { Custom code Alert ("Mobile phone cannot be empty"); }else if (data.code==3) { Custom code Alert ("The unit cannot be empty"); }else{ Custom code Alert ("Successful appointment"); } }); });

It's important to note that in the back-end PHP code, the "&callback=" must be passed in. "Also lose out, such as:

The code is as follows	Copy Code
View Sourceprint $CB = $_get[' callback ']; echo $CB. " ({code: ". Json_encode (4)."});

The above is a simple $.getjson test, through which the experiment