PHP中通过json格式定义字面量对象

var o = { 'name' : 'qq52o' , 'url' : 'www.qq52o.me' };
alert(o.name);

o = { 'name' : 'qq52o' , 'url' : 'www.qq52o.me' }
print o['name']

$a = { "name" : "qq52o", "url" : "www.qq52o.me" };

[root@qq52o www]# php a.php
PHP Parse error: syntax error, unexpected '{' in /data0/htdocs/www/a.php on line 4

$a = '{ "name" : "qq52o", "url" : "www.qq52o.me" }';
$a = json_decode($a);
print_r($a);

[root@qq52o www]# php a.php
stdClass Object
(
[name] => qq52o
[url] => www.qq52o.me
)

$a = '{ "name" : "qq52o", "url" : "www.qq52o.me" , "arr":["zhangsan","lisi"] }';
$a = json_decode($a);
print_r($a);

[root@lee www]# php a.php
stdClass Object
(
[name] => qq52o
[url] => www.qq52o.me
[arr] => Array
　　　(
[0] => zhangsan
[1] => lisi
　　　)
)