Create PHP array from MySQL column

There is no function to do this using the mysql extension, you can do this:

$result = array();
while ($row = mysql_fetch_array($r, MYSQL_NUM)) {
    $result[] = $row[0];
}

It is apparently marginally faster to fetch the columns in a numerically indexed array, and there is no real benefit here to having the associative array format.

you could loop through the array, and create a new one, like so:

$column = array();

while($row = mysql_fetch_array($info)){
    $column[] = $row[$key];
//Edited - added semicolon at the End of line.1st and 4th(prev) line

}