Json

La información
La información que vamos a utilizar está contenida en formato JSON de la siguiente manera:
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1. <?php   
2.     header("Content-Type: text/plain");    
3.   
4.     echo "{  
5.         total:9,  
6.         data:[{  
7.             id: 1,  
8.             name: 'Crysfel',  
9.            occupation: 'Software developer',  
10.             gender: 'm',  
11.             age: 25  
12.         },{  
13.             id: 2,  
14.             name: 'Sasha',  
15.             occupation: 'Figure skater',  
16.             gender: 'f',  
17.             age: 24  
18.         },{  
19.             id: 3,  
20.             name: 'Jack',  
21.            occupation: 'Software Architect',  
22.             gender: 'm',  
23.             age: 35  
24.         },{  
25.             id: 4,  
26.             name: 'John',  
27.             occupation: 'Javascript developer',  
28.             gender: 'm',  
29.             age: 22  
30.         },{  
31.             id: 5,  
32.             name: 'Sara',  
33.            occupation: 'Designer',  
34.             gender: 'f',  
35.             age: 31  
36.         },{  
37.             id: 6,  
38.             name: 'Nicole',  
39.             occupation: 'Tester',  
40.             gender: 'f',  
41.             age: 31  
42.         },{  
43.             id: 7,  
44.             name: 'Carl',  
45.             occupation: 'Photographer',  46.             gender: 'm',  
47.             age: 45  
48.         },{  
49.             id: 8,  
50.             name: 'Will',  
51.             occupation: 'Actor',  
52.             gender: 'm',  
53.             age: 32  
54.         },{  
55.             id: 9,  
56.             name: 'Penny',  
57.             occupation: 'Waitress',  
58.            gender: 'f',  
59.             age: 28  
60.         }]  
61.     }";   
62. ?>  
<?php
header("Content-Type: text/plain");

echo "{
total:9,
data:[{
id: 1,
name: 'Crysfel',
occupation: 'Softwaredeveloper',
gender: 'm',
age: 25
},{
id: 2,
name: 'Sasha',
occupation: 'Figure skater',
gender: 'f',
age: 24
},{
id: 3,
name: 'Jack',
occupation: 'Software Architect',gender: 'm',
age: 35
},{
id: 4,
name: 'John',
occupation: 'Javascript developer',
gender: 'm',
age: 22
},{
id: 5,
name: 'Sara',
occupation: 'Designer',gender: 'f',
age: 31
},{
id: 6,
name: 'Nicole',
occupation: 'Tester',
gender: 'f',
age: 31
},{
id: 7,
name: 'Carl',
occupation: 'Photographer',
gender:'m',
age: 45
},{
id: 8,
name: 'Will',
occupation: 'Actor',
gender: 'm',
age: 32
},{
id: 9,
name: 'Penny',
occupation: 'Waitress',...