In php, json_decode returns an array or an object instance.

Source: Internet
Author: User

1. json_decode ()

Json_decode
(PHP 5> = 5.2.0, PECL json> = 1.2.0)

Json_decode-encode strings in JSON format

Description
Mixed json_decode (string $ json [, bool $ assoc])
Accept a JSON string and convert it to a PHP variable

Parameters

Json
A string in json string format.

Assoc
If this parameter is set to TRUE, array instead of object is returned.


Return Value
Returns an object or if the optional assoc parameter is TRUE, an associative array is instead returned.

Example

Example #1 Example of json_decode ()

The Code is as follows:
<? Php
$ Json = '{"a": 1, "B": 2, "c": 3, "d": 4, "e": 5 }';
Var_dump (json_decode ($ json ));
Var_dump (json_decode ($ json, true ));
?>

The above example will output:

Object (stdClass) #1 (5 ){
["A"] => int (1)
["B"] => int (2)
["C"] => int (3)
["D"] => int (4)
["E"] => int (5)
}

Array (5 ){
["A"] => int (1)
["B"] => int (2)
["C"] => int (3)
["D"] => int (4)
["E"] => int (5)
} Http://www.111cn.net/phper/php-cy/57800.htm


$ Data = '[{"Name": "a1", "Number": "123", "Contno": "000", "QQNo ":""}, {"Name": "a1", "Number": "123", "Contno": "000", "QQNo": "" },{ "Name ": "a1", "Number": "123", "Contno": "000", "QQNo": ""}] ';
Echo json_decode ($ data );

Result:

Array ([0] => stdClass Object ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] =>) [1] => stdClass Object ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] =>) [2] => stdClass Object ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ))
 

It can be seen that the object compiled by json_decode () is an object. Now, output json_decode ($ data, true) and try again.

The Code is as follows:
Echo json_decode ($ data, true );

Result:

Array ([0] => Array ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] =>) [1] => Array ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] =>) [2] => Array ([Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ))
 

We can see an associated array output by json_decode ($ data, true). From this we can see that json_decode ($ data) Outputs An object, while json_decode ("$ arr", true) is to force generate PHP associated array.


Assume that the JSON data we obtain is as follows: (you can use curl, fsockopen, and so on)

The Code is as follows:
{
"From": "zh ",
"To": "en ",
"Trans_result ":[
{
"Src": "u4f60u597d ",
"Dst": "Hello"
}
]
}
 

I. json_decode:

Json_decode ($ data, true); Use the json_decode function to return array:

The Code is as follows:
Array
(
[From] => zh
[To] => en
[Trans_result] => Array
(
[0] => Array
(
[Src] => hello
[Dst] => Hello
)

)

)
 

We can use the following methods in PHP to obtain the desired value:

The Code is as follows:
<? Php
$ Data = <STR
{
"From": "zh ",
"To": "en ",
"Trans_result ":[
{
"Src": "u4f60u597d ",
"Dst": "Hello"
}
]
}
STR;
$ Jsondata = json_decode ($ data, true );
Header ("Content-Type: text/html; charset = UTF-8 ");
Print_r ($ jsondata); www.111cn.net
Echo "<br/>". $ jsondata ['to']; // en
Echo "<br/>". $ jsondata ['Trans _ result'] [0] ['dst ']; // Hello
?>
 

Ii. json_decode:

Json_decode ($ data );

Use the json_decode function to return the object:

The Code is as follows:
StdClass Object
(
[From] => zh
[To] => en
[Trans_result] => Array
(
[0] => stdClass Object
(
[Src] => hello
[Dst] => Hello
)

)

)
 

We can use the following methods in PHP to obtain the desired value:

The Code is as follows:
<? Php
$ Data = <STR
{
"From": "zh ",
"To": "en ",
"Trans_result ":[
{
"Src": "u4f60u597d ",
"Dst": "Hello"
}
]
}

STR;
$ Jsondata = json_decode ($ data );
Header ("Content-Type: text/html; charset = UTF-8 ");
Print_r ($ jsondata );
Echo "<br/>". $ jsondata-> from; // zh
Echo "<br/>". $ jsondata-> trans_result [0]-> src; // hello
?>
 

For more details, see: http://www.111cn.net/phper/php-cy/57800.htm

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.