Parsing JSON gives few separate elements put toghether as one - php

Question

I get following JSON (which I have validated here):
{
"name": "Brian",
"agentid": "12345",
"username": "bob",
"passcode": "bob01",
"call": {
"aa": "11",
"bb": "22",
"cc": "33",
"dd": "44"
},
"call": {
"aa": "111",
"bb": "222",
"cc": "333",
"dd": "444"
},
"call": {
"aa": "1111",
"bb": "2222",
"cc": "3333",
"dd": "4444"
},
"call": {
"aa": "11111",
"bb": "22222",
"cc": "33333",
"dd": "44444"
}
}
When I put this through var_dump(json_decode($json, true));, it gives me:
array(5) {
["name"]=> string(5) "Brian"
["agentid"]=> string(5) "12345"
["username"]=> string(3) "bob"
["passcode"]=> string(5) "bob01"
["call"]=> array(4) {
["aa"]=> string(5) "11111"
["bb"]=> string(5) "22222"
["cc"]=> string(5) "33333"
["dd"]=> string(5) "44444"
}
}
It looks like the first three call elements are overwritten.
How to parse this JSON and retain all call elements?

Answer 1

This is valid JSON syntax, but content makes no sense. Having more the one key of the same name is wrong. You should make single call and turn it into JSON array where you would store all objects:
{
"name":"Brian",
"agentid":"12345",
"username":"bob",
"passcode":"bob01",
"call":[
{
"aa":"11",
"bb":"22",
"cc":"33",
"dd":"44"
},
{
"aa":"111",
"bb":"222",
"cc":"333",
"dd":"444"
},
{
"aa":"1111",
"bb":"2222",
"cc":"3333",
"dd":"4444"
},
{
"aa":"11111",
"bb":"22222",
"cc":"33333",
"dd":"44444"
}
]
}