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Returns the name of a field (PHP 4 >= 4.2.0, PHP 5)
string pg_field_name ( resource result, int field_number )

pg_field_name() returns the name of the field occupying the given field_number in the given PostgreSQL result resource. Field numbering starts from 0.


This function used to be called pg_fieldname().



PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).


Field number, starting from 0.

Return Values

The field name, or FALSE on error.


Example 1927. Getting information about fields

= pg_connect("dbname=publisher") or die("Could not connect");

$res = pg_query($dbconn, "select * from authors where author = 'Orwell'");
$i = pg_num_fields($res);
 for (
$j = 0; $j < $i; $j++) {
"column $j\n";
$fieldname = pg_field_name($res, $j);
"fieldname: $fieldname\n";
"printed length: " . pg_field_prtlen($res, $fieldname) . " characters\n";
"storage length: " . pg_field_size($res, $j) . " bytes\n";
"field type: " . pg_field_type($res, $j) . " \n\n";

The above example will output:

column 0
fieldname: author
printed length: 6 characters
storage length: -1 bytes
field type: varchar

column 1
fieldname: year
printed length: 4 characters
storage length: 2 bytes
field type: int2

column 2
fieldname: title
printed length: 24 characters
storage length: -1 bytes
field type: varchar