php json_decode函数

json_decode — 对 JSON 格式的字符串进行编码

mixed json_decode ( string json[,booljson [, bool assoc ] )

返回一个对象，如果assoc参数选项为true，将会返回一个关联数组。

$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';

var_dump(json_decode($json));
var_dump(json_decode($json, true));

输出结果:
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)
}