How PHP returns JSON-formatted data to jquery_php tutorial

JSON-formatted data is the data that we have been using in our application development, such as working with jquery or with the API, using JSON data, so how does PHP return JSON-formatted data to jquery, and let me introduce you to the students.

Manipulating JSON data in jquery we $.parsejson directly (returnstring).

Cases

The code is as follows	Copy Code
$ (function () { $ (' #send '). Click (function () { $.getjson (' Test.js ', function (data) { $ (' #resText '). empty (); var html = '; $.each (data, function (Commentindex, comment) { HTML + = ' ' + comment[' username ' + ': ' + comment[' content ' + ' '; }) $ (' #resText '). HTML (HTML); }) }) })

All you need to do is store the data in a properly formatted. json or. js file. The following is the JSON-formatted data transmitted by the example

The code is as follows	Copy Code
[ { "username": "Zhang San", "Content": "Sofa." }, { "username": "John Doe", "Content": "Bench." }, { "username": "Harry", "Content": "Floor." } ]

The JSON data mentioned above is fixed, how do we return the JSON data with PHP?

PHP Output JSON Format method

Page, add

Header (' Content-type:text/json ');

This header is to inform this file output type is JSON, this form we see most is the verification code--php output to verify the picture, sometimes php can output CSS files, JS files and so do some interesting things. Okay, let's test it.

The code is as follows	Copy Code
< PHP Header (' Content-type:text/json '); $fruits = Array ( "Fruits" = Array ("A" and "Orange", "B" and "Banana", "c" = "apple"), "Numbers" = = Array (1, 2, 3, 4, 5, 6), "holes" = = Array ("First", 5 = "Second", "third") ); echo Json_encode ($fruits); ?>

Instance

Generate JSON format for data read from database

The code is as follows

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Tutorial provided by the first PHP network--generating JSON format for data read from the database Note the structural differences between the two methods of generating an array of objects Echo ' Fayi '; Suppose the following array is generated from the data we read from the database $jarr =array (' Total ' =>239, ' Row ' =>array ( Array (' Code ' = ' 001 ', ' name ' = ' China ', ' addr ' = ' Address one ', ' col4 ' = ' col4 data '), Array (' Code ' = ' 002 ', ' name ' = = ' Name 2 ', ' addr ' = ' Address ', ' col4 ' = ' col4 data '), ) ); Law One: $jobj =new Stdclass ();//Instantiate Stdclass, which is an empty class built into PHP that can be used to pass data, since the Json_decode data is stored as an array of objects, So we have to store the data in the object when we build it. foreach ($jarr as $key = = $value) { $jobj $key = $value; } Print_r ($jobj);//Print the object after passing the property Echo ' uses $jobj->row[0][' code '] to output array elements: '. $jobj->row[0][' code '. ' '; Echo ' encoded JSON string: '. Json_encode ($jobj). ' ';//print the encoded JSON string Law II: Echo '; Echo ' Law II '; Echo ' encoded JSON string: '; echo $str =json_encode ($jarr);//JSON encoding of the array Echo ' '; $arr =json_decode ($STR);//JSON decoding Print_r ($arr);//print decoded array, data stored in object array Echo ' uses the $arr->row[0]->code output array element: '. $arr->row[0]->code; ?>

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