Jquery handles json objects

On the server side of the PHP script:

<?php   

$data['id'] = 1;   

$dat['name'] = "mary";   

$da['red']= array_merge($data,$dat);   

  

$data1['id'] = 2;   

$dat1['name'] = " The swallow ";   

$da['blue']= array_merge($data1,$dat1);   

print_r($da);   //Printed out as a 2-d array (as shown) & NBSP;   < br / >
/*

Array  

(  

    [red] => Array  

        (  

            [id] => 1  

            [name] => mary  

        )  

 

    [blue] => Array  

        (  

            [id] => 2  

            [name] =>  The swallow   

        )  

)  

*/  

  

  

echo json_encode($da);//The output is a string converted to json, which you can use directly in js (as shown) & NBSP;   < br / >
/*

{"red":{"id":1,"name":"mary"},"blue":{"id":2,"name":"u71d5u5b50"}}  

*/  

?>  

The jquery script:
Processing after returning to js:
The first thing to do with varl is to convert a string to a jquery object using eval.

var arr = '{"red":{"id":1,"name":"mary"},"blue":{"id":2,"name":"u71d5u5b50"}}';   //u71d5u5b50 this is automatically converted in PHP & PI;   < br / >
var dataObj = eval("("+arr+")");    //I don't know why I put the parentheses and double quotation marks there, but it's just json syntax, which I have to memorize & NBSP;;   < br / >
    $.each(dataObj,function(idx,item){   

    //The output         < br / >
    alert(item.id+" Ha ha "+item.name);   

})  

Second: those that do not need to be converted:

var arr = {"red":{"id":1,"name":"mary"},"blue":{"id":2,"name":"u71d5u5b50"}};   

$.each(arr,function(idx,item){   

    //The output     < br / >
    alert(item.id+" Ha ha "+item.name);   

})  

There are also two ways to loop:

//Method one:
$.each(arr,function(idx,item){        

    //The output     < br / >
    alert(item.id+" Ha ha "+item.name);   

})  

//Method 2:
for(var key in arr){   

    alert(key);   

    alert(arr[key].status);   

}