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PHP. Руководство по PHP. 2005

pg_field_is_null

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След.

pg_field_is_null

(PHP 4 >= 4.2.0, PHP 5)pg_field_is_null -- Test if a field is SQL NULL

Описание

int pg_field_is_null (resource result, int row, mixed field)

int pg_field_is_null (resource result, mixed field)

pg_field_is_null() tests if a field in a PostgreSQL

result resource is SQL NULL or not.

Замечание:

This function used to be called pg_fieldisnull().

Список параметров

result

PostgreSQL query result resource, returned by pg_query(),

pg_query_params() or pg_execute()

(among others).

row

Row number in result to fetch. Rows are numbered from 0 upwards. If omitted,

current row is fetched.

field

Field number (starting from 0) as an integer or

the field name as a string.

Возвращаемые значения

Returns 1 if the field in the given row is SQL NULL, 0

if not. FALSE is returned if the row is out of range, or upon any other error.

Примеры

Пример 1. pg_field_is_null() example

<?php

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

$res = pg_query($dbconn, "select * from authors where author = 'Orwell'");

if ($res){

if (pg_field_is_null($res, 0, "year") == 1){

echo "The value of the field year is null.\n";

}

if (pg_field_is_null($res, 0, "year") == 0){

echo "The value of the field year is not null.\n";

}

}

?>

Пред.

Начало

След.

pg_fetch_row

Уровень выше

pg_field_name

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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