(PECL CUBRID >= 8.3.0)
cubrid_field_flags — Returns a string with the flags of the given field offset
This function returns a string with the flags of the given field offset separated by space. You can split the returned value using explode. The possible flags could be: not_null, primary_key, unique_key, foreign_key, auto_increment, shared, reverse_index, reverse_unique and timestamp.
This is the request identifier.
The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.
A string with flags, when process is successful.
FALSE when invalid field_offset value.
-1 if SQL sentence is not SELECT.
Example #1 cubrid_field_flags() example
<?php
    $link = cubrid_connect("localhost", 30000, "demodb2", "dba", "");
    if (!$link)
    {
        die('Could not connect.');
    }
    $query = 'SELECT id, name, address, salary FROM employees';
    $result = cubrid_execute($link, $query);
    if ($result) 
    {
        $flags = cubrid_field_flags($result, 0);
        print_r(explode(' ', $flags));
        cubrid_close_request($result); 
    }
?>
The above example will output:
Result: Array ( [0] => not_null [1] => unique_key [2] => auto_increment )