PHP kézikönyv
Előző |  | Következő

# pg_field_num

(PHP 4 >= 4.2.0, PHP 5)

pg_field_num -- Returns the field number of the named field

## Leírás

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.

> Megjegyzés: This function used to be called pg_fieldnum().

## Paraméterek

result

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

field_name

  The name of the field.

## Visszatérési értékek

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

## Példák

Példa 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'); ?>`
A fenti példa a következő kimenetet adja:
    Column 'title' is field number: 2

## Lásd még

pg_field_name()

Előző | Tartalom | Következő
pg_field_name | Fel | pg_field_prtlen