Json_decode returning an array or object in PHP _php tutorial

1.json_decode ()

Json_decode

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

json_decode-encoding a JSON-formatted string

Description

Mixed Json_decode (String $json [, bool $assoc])

Accept a JSON-formatted string and convert it to a PHP variable

Parameters

Json

String in JSON string format to decode.

Assoc

When this argument is TRUE, an array is returned instead of an object.

return value

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

Example

Examples of Example #1 Json_decode ()

The code is as follows

$json = ' {' A ': 1, ' B ': 2, ' C ': 3, ' d ': 4, ' E ': 5} '; Var_dump (Json_decode ($json)); Var_dump (Json_decode ($json, true)); ?> The example above 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) } $data = ' [{' name ': ' A1 ', ' Number ': ' 123 ', ' Contno ': ', ' ' qqno ': '},{' Name ': ' A1 ', ' Number ': ' 123 ', ' Contno ': ' $ ', ' qqno ":" "},{" Name ":" A1 "," Number ":" 123 "," Contno ":" The "," Qqno ":"}] '; echo Json_decode ($data); The result is: Array ([0] = StdClass Object ([Name] = + a1 [number] = 123 [Contno] [qqno] = =) [1] = Stdclas s Object ([name] = + a1 [number] = 123 [Contno] [qqno] = = [2] = = StdClass Object ([name] = a 1 [number] [123] [Contno] [qqno] [] =]

It can be seen that the object is compiled by Json_decode (), and now output Json_decode ($data, true) try

code as follows
echo Json_decode ($data, true); knot Fruit: array ([0] = = Array ([Name] + a1 [number] = 123 [Contno] = [Qqno] = [1] = = Array ([name] = a1 [number] = 123 [Contno] [qqno] = [2] = = Array ([name] = = = > 123 [Contno] [qqno] =)

You can see an associative array of Json_decode ($data, true) output, so Json_decode ($data) outputs an object, and Json_decode ("$arr", true) is forcing it to generate a PHP associative array.

If we get the JSON data as follows: (can be obtained using curl, fsockopen, etc.)

The code is as follows
{ "From": "zh", "To": "en", "Trans_result": [ { "src": "u4f60u597d", "DST": "Hello" } ] }

First, Json_decode returns an array in the same way:

Json_decode ($data, True), with the Json_decode function returning an array:

code as follows
array ( [from] + zh [to] = en [trans_result] + Array ( [0] = ARR Ay ( [src] = Hello [dst] = Hello ) " )

We can get the values we want in the PHP language in the following ways:

code as follows
!--? php $data = << { " from ":" zh ", " to ":" en ", " Trans_resul T ": [ { " 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 " ". $jsondata [' to ']; En Echo " ". $jsondata [' Trans_result '][0][' DST ']; Hello ?

Second, the way Json_decode returns object:

Json_decode ($data);

The way to return an object with the Json_decode function gets:

code as follows
stdclass Object ( [from] + zh [to] = en [trans_result] + Array ( [0] = = StdClass Object ( [src] = Hello [DST] + Hello ) " )

We can get the values we want in the PHP language in the following ways:

The code is as follows
$data = <<<> { "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 " ". $jsondata->from; Zh echo " ". $jsondata->trans_result[0]->src; How are you doing ?>

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