Create PHP array out of table column - php

Question

I am trying to create a loop that displays each row in a table. I think I need to make an array out of the PK, but I can't figure out how to do that. Here is my code so far:
$conn = dbConnect('read');
$getData = 'SELECT * FROM table';
$allData = $conn->query($getdata);
if (!$allData) {
$error = $conn->error;
} else {
$data = $allData->fetch_assoc();
$rowId = array($data['PK']);
} while ($rowId <= count($rowId)) {
// code to be run for each row
$rowId++;
}
EDIT: Sorry my question is confusing, I'm new to PHP.

Answer 1

Your question is a bit confusing but I think this is what you are trying to do:
$sql = 'SELECT * FROM table';
$query = $conn->query($sql);
while ($row = $query->fetch_assoc()) {
$data[$row['PK']] = $row;
}
That would iterate over each row, creating an array and using the row's value for column PK as an associative array key.

Answer 2

fetch_assoc() (I assume mysqli here now) doesn't fetch all data from a result, but one row after each other. So you don't need to make an array of $row['PK'], but need to loop over the results.
$conn = dbConnect('read');
$getData = 'SELECT * FROM `table`'; // you would need backticks here, if the table really is called "table" (what you shouldn't do...)
$result = $conn->query($getData); // it's not 'allData', it is a result_set. And be carefull about Case! $getData!=$getdata
if (!$result) {
$error = $conn->error;
} else {
$cnt=0;
while($row = $result->fetch_assoc()) {
// code to be run for each row
// you can display $row['PK'] now:
echo $row['PK'];
// or add that value to something else, whatever you need
$cnt = $cnt+$row['PK'];
// or to have a new array with the values of one table-column:
$columnRows[] = $row['PK'];
}
// now you can use the created array
foreach($columnRows as $PK) {
echo $PK;
}
}