(PHP 4 >= 4.2.0, PHP 5)
pg_field_num — Returns the field number of the named field
pg_field_num() will return the number of the field number that corresponds to the field_name in the given PostgreSQL result resource.
Note: This function used to be called pg_fieldnum().
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
The name of the field.
The field number (numbered from 0), or -1 on error.
Example#1 Getting information about fields
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
$res = pg_query($dbconn, "select author, year, title from authors where author = 'Orwell'");
echo "Column 'title' is field number: ", pg_field_num($res, 'title');
?>
El resultado del ejemplo seria:
Column 'title' is field number: 2