Foreach loop inside while loop - it never ends - php

Question

So, I have one curl API call which works fine when I do foreach outside the while loop. Once I move the foreach inside (because I need the values inside) it becomes an infinity loop.
This is the setup
$query = "SELECT id, vote FROM `administrators` WHERE type = 'approved'";
$result = $DB->query($query);
$offset = 0;
$length = 5000;
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
do {
curl_setopt($ch, CURLOPT_URL, "https://api.gov/data?api_key=xxxxxxxxxx&start=1960&sort[0][direction]=desc&offset=$offset&length=$length");
$jsonData = curl_exec($ch);
$response = json_decode($jsonData);
foreach($response->response->data as $finalData){
$allData[] = $finalData;
}
$offset += count($response->response->data);
} while ( count($response->response->data) > 0 );
curl_close($ch);
while($row = $DB->fetch_object($result)) {
foreach ( $allData as $key => $finalData1 ) {
// rest of the code
}
}
Once I run the page it goes infinity or until my browser crash. If I move foreach ( $allData as $key => $finalData1 ) { } outside the while(){} there is no such problem.
Any ideas on what can be the problem here?
UPDATE: // rest of the code
$dataValue = str_replace(array("--","(s)","NA"),"NULL",$finalData1->value);
if($frequency == "dayly") {
if($dataValue) {
$query = "UPDATE table SET $data_field = $dataValue WHERE year = $finalData1->period AND id = $row->id LIMIT 1";
}
}
if(isset($query))
$DB->query($query);
unset($query);

Answer 1

One of the issues could be that where
// rest of the code
is, you have duplicate variable names, thus overriding current positions in arrays and loops.
However, you should change your approach to something like
$rows = Array();
while($row = $DB->fetch_object($result)) $rows[] = $row;
foreach ($rows as $row) {
foreach ($allData as $key => $finalData1) {
// rest of the code
}
}
That way you can read resultset from database faster and free it before you continue.