(PHP 5, PECL OCI8 >= 1.1.0)
oci_field_name — Returns the name of a field from the statement
$statement
   , int $field
   )
   Returns the name of the field.
  
statementA valid OCI statement identifier.
fieldCan be the field's index (1-based) or name.
   Returns the name as a string, or FALSE on errors.
  
Example #1 oci_field_name() example
<?php
$conn = oci_connect("scott", "tiger");
$stmt = oci_parse($conn, "SELECT * FROM emp");
oci_execute($stmt);
echo "<table border=\"1\">";
echo "<tr>";
echo "<th>Name</th>";
echo "<th>Type</th>";
echo "<th>Length</th>";
echo "</tr>";
$ncols = oci_num_fields($stmt);
for ($i = 1; $i <= $ncols; $i++) {
    $column_name  = oci_field_name($stmt, $i);
    $column_type  = oci_field_type($stmt, $i);
    $column_size  = oci_field_size($stmt, $i);
    echo "<tr>";
    echo "<td>$column_name</td>";
    echo "<td>$column_type</td>";
    echo "<td>$column_size</td>";
    echo "</tr>";
}
echo "</table>\n";
oci_free_statement($stmt);
oci_close($conn);
?>
Note:
In PHP versions before 5.0.0 you must use ocicolumnname() instead. This name still can be used, it was left as alias of oci_field_name() for downwards compatability. This, however, is deprecated and not recommended.