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

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 ()

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<? 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) } $ 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.

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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)

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{ "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:

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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:

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<? 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:

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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:

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<? 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 ?>