"PHP" JSON value and PHP received several cases, JSON several cases _php tutorial

"PHP" JSON value and PHP received several cases, JSON several cases

Using Chrome's back-end network, we analyzed several cases when the JSON data was post to PHP via jquery's $.ajax():

 
  
  

  
   
   
JSON data cannot be obtained in PHP via $_post and $_request, i.e.
$json $_post [' JSON '];  // Empty ($json) is 1
 
  
  
Note: PHP only recognizes application/x-www.form-urlencoded standard data types by default, so content such as text/xml or soap or application/octet-stream cannot be parsed. If you use the $_post array to receive it, it will fail. 

Situation A:

JS does not add attribute contenttype: "Application/json; Charset=utf-8 ",
var function () {    $.ajax ({        "post",        ' add-post-json.php ',        false//  Use synchronous mode        ///  1 need to use json.stringify otherwise format for a=2&b=3&now=14        ... // 2 Forced type conversion is required, otherwise the format is {"A": "2", "B": "3"}         data:JSON.stringify ({                              a:parseint ($ (' input[name= "a"] "). Val ()),            B:parseint ($ ( ' input[name= "B"]). Val ()            ),new//  Note Do not add commas on this line         } ),                "JSON",        function(data) {            $ (' #result '). Text ( Data.result);         // be careful not to add commas on this line     });}

 
 

  
  
 
   
The data cannot be obtained after using the $GLOBALS [' http_raw_post_data '], i.e.
 
  
 
 
$json $GLOBALS [' Http_raw_post_data '];  // Empty ($json) is 1

 
 

  
  
 
   
Use File_get_contents ("Php://input"); Data can be obtained, i.e.
 
  
 
 
$json file_get_contents ("Php://input");   // Empty ($json) is 0

Case B:

JS added attribute contenttype: "Application/json; Charset=utf-8 ",
  var  submit_sync =  function   () {$.ajax ({type:  " Post ", url:  ' add-post-json.php ' , async:   false , //  use synchronization  //  1 need to use json.stringify otherwise format a=2&b=3&now=14 ...  //  2 requires a type cast, otherwise the format is {"A": "2", "B": "3"}   data:JSON.stringify ({a:parseint ($ ( ' input[name= "a"] ' ). VA L ()), B:parseint ($ ( ' input[name= "B"] ' ). Val ()), now:   new  Dat E (). GetTime () //  Be careful not to add commas on this line  }),   ContentType:     "Application/json; Charset=utf-8 "   ,    
            "JSON",            function(data) {                $ (' #result '). Text (data.result);             // be careful not to add commas on this line         });    }

 
 

  
  
 
   
Use $GLOBALS [' Http_raw_post_data '] to  get the data, i.e.
 
  
 
 
$json $GLOBALS [' Http_raw_post_data '];  // Empty ($json) is 0

 
 

  
  
 
   
Use File_get_contents ("Php://input"); Data can be obtained, i.e.
 
  
 
 
$json file_get_contents ("Php://input");   // Empty ($json) is 0
Note: Php://input allows you to read the original data of the POST. Compared to $HTTP _raw_post_data, it brings less pressure to memory and does not require any special php.ini settings. Php://input cannot be used for enctype= "Multipart/form-data". 

Case C:

Do you want to add the following
Header (' Content-type:application/json;charset=utf-8 ');
There is no effect on the outcome of situation A and condition B.

Starting with version 5.2, PHP native provides the Json_encode () and Json_decode () functions, which are used for encoding, which is used for decoding. The following blog is written in detail, mark!

Using json:http://www.ruanyifeng.com/blog/2011/01/json_in_php.html in the PHP language

http://www.bkjia.com/PHPjc/972513.html www.bkjia.com true http://www.bkjia.com/PHPjc/972513.html techarticle "PHP" JSON transfer value and PHP received several cases, JSON in several cases using Chrome's back-end network, analysis of the $.ajax () via jquery () JSON data post to PHP when the case: no ...

