Processing mode ajax return JSON

JSON objects by "{}" to identify a "{}" represents an object, such as { "AreaId": "123"}, the value of the object key-value pairs (key: value).

json_encode()                                                                      

This function is mainly used for the array and the object, it is converted to the format json

json_encode 
(the PHP. 5> = 5.2.0, the PECL JSON> = 1.2.0) 

json_encode - coding of variables JSON 

Report a bug description 
string json_encode (mixed $ value [,  int $ options = 0])
Returns the value of the value as JSON 

Report a bug parameter 

value 
to be encoded value, in addition to the resource type, the data can be any type of 

function can only accept the UTF-8 encoded data 

options 
binary mask consisting of the following constants: JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS , JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT, JSON_UNESCAPED_UNICODE. 

the Report bugs a return value 
encoding a successful string form represented in JSON or FALSE return failure.

 

() Get json object with the $ .ajax.

// in which dataType: "json", so that the data back to the format json. If you do not add the article attribute to a string is returned. String object can ( "(" + data + ")") method json turn into an object, but this method is not recommended for the data fetch operation by the above eval. Distinguish data as JSON object or a string, can print alert statement, if it is Object object it is JSON object, if the content was displayed string.

$.ajax( {
     type : "POST",
     url : "testjson!getJson.do",
     dataType:"json",
     cache:false,
     async:false,
     data : "",
     success : function(data) {
      //var object = eval("("+data+")");
      $.each(data.list,function(index,item){
       alert(item.trueName);
      })
     }
    });

 

jquery commonly used data types Json

Json data to the key and value pairs exist, colon connection, separated by commas, can store any type of data

Json definition:

    There js = {

            "one":1111,

            "two":"2222",

            3:new array(1,2,3),

            "four":{a:1,b:2,c:3},

             // [] array may be expressed, the contents of which can be taken through the index, taking the contents by json point or key index

             4:[1111,"2222",{a:4,b:5,c:6}],           

            };

//

// can define any type, which can point key value (key value must be a string), or by key index (in brackets)

// Value Method One:

    js.one;

// Value Method Two:

    js["one"];        js[3];

 

// Traverse Json

for(var k in js){

     alert(js[k]);

}