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# pg_field_num

(PHP 4 >= 4.2.0, PHP 5)

pg_field_num -- Returns the field number of the named field

## Description

int pg_field_num ( resource result, string field_name )

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().

## Parameters

`result`

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

`field_name`

  The name of the field.

## Return Values

The field number (numbered from 0), or -1 on error.

## Examples

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'); ?>`

The above example will output:

    Column 'title' is field number: 2

## See Also

pg_field_name()

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