Json mutiple dimension unable to read php - php

Question

I have the following JSON file:
[
{
"1421999354744": {
"article_id": "213123",
"artfile_status": "",
"process_starttime": "2015\/01\/23 13:19:14",
"process": "Validator",
"process_endtime": "2015\/01\/23 13:19:14",
"process_status": "COMPLETED",
"sub_process_name": "",
"percentage_completed": "100",
"XML_Validity": "false",
"process_type": "AUTO"
}
},
{
"1421999527002": {
"article_id": "213123",
"artfile_status": "",
"process_starttime": "2015\/01\/23 13:22:06",
"process": "Validator",
"process_endtime": "2015\/01\/23 13:22:06",
"process_status": "COMPLETED",
"sub_process_name": "",
"percentage_completed": "100",
"XML_Validity": "false",
"process_type": "AUTO"
}
},
{
"1421999580405": {
"article_id": "213123",
"artfile_status": "",
"process_starttime": "2015\/01\/23 13:23:00",
"process": "Validator",
"process_endtime": "2015\/01\/23 13:23:00",
"process_status": "COMPLETED",
"sub_process_name": "",
"percentage_completed": "100",
"XML_Validity": "false",
"process_type": "AUTO"
}
}
]
I need to get the values of article_id in the above. I've tried to read the multiple dimension but it shows an error.
The code that I have is as follows:
foreach ($response as $key => $value) {
$t = $response[$i];
foreach ($t as $key1 => $value2) {
echo $t[$j]['article_id'];
$j++;
}
$i++;
}
The first array values will be dynamic.
Any help would be appreciated!

Answer 1

You do not need counters at all(in your case $i, $j). You can extract the value from the array by iterating over the array and extracting the data directly from the current value of the iterator:
foreach ($response as $key => $value) {
// Get the first value of the sub-array array,
// which is actually the array you want to extract values from
$value = current($value);
// Print out the article id value
// if your json has been decoded as an array use $value['article_id']
echo $value->article_id;
}