pg_field_name

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

pg_field_name — Returns the name of a field

Description

pg_field_name(PgSql\Result $result, int $field): string

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

Note:

This function used to be called pg_fieldname().

Parameters

result

An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).

field

Field number, starting from 0.

Return Values

The field name.

Changelog

VersionDescription
8.1.0The result parameter expects an PgSql\Result instance now; previously, a resource was expected.

Examples

Example #1 Getting information about fields

<?php
$dbconn = 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++) {
echo "column $j\n";
$fieldname = pg_field_name($res, $j);
echo "fieldname: $fieldname\n";
echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters\n";
echo "storage length: " . pg_field_size($res, $j) . " bytes\n";
echo "field type: " . pg_field_type($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

See Also