PHP 8.1.0 Released!

pg_field_is_null

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

pg_field_is_nullTest if a field is SQL NULL

Descripción

pg_field_is_null(PgSql\Result $result, int $row, mixed $field): int
pg_field_is_null(PgSql\Result $result, mixed $field): int

pg_field_is_null() tests if a field in an PgSql\Result instance is SQL NULL or not.

Nota:

This function used to be called pg_fieldisnull().

Parámetros

result

An PgSql\Result instance, 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 int or the field name as a string.

Valores devueltos

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.

Historial de cambios

Versión Descripción
8.1.0 The result parameter expects an PgSql\Result instance now; previously, a recurso was expected.

Ejemplos

Ejemplo #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 (
$res) {
      if (
pg_field_is_null($res0"year") == 1) {
          echo 
"The value of the field year is null.\n";
      }
      if (
pg_field_is_null($res0"year") == 0) {
          echo 
"The value of the field year is not null.\n";
    }
 }
?>

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top