Returns an entire single column of a result set as an indexed array.
Note that this method will run the result set to the end.
$index: The index of the column number to fetch.
An indexed array, or an empty array if there is no result set.
Overrides DatabaseStatementInterface::fetchCol
public function fetchCol($index = 0) {
if (isset($this->columnNames[$index])) {
$column = $this->columnNames[$index];
$result = array();
// Traverse the array as PHP would have done.
while (isset($this->currentRow)) {
$result[] = $this->currentRow[$this->columnNames[$index]];
$this
->next();
}
return $result;
}
else {
return array();
}
}