pg_field_num

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

pg_field_numReturns the field number of the named field

Descripción

pg_field_num(PgSql\Result $result, string $field): int

pg_field_num() will return the number of the field number that corresponds to the field in the given result instance.

Nota:

This function used to be called pg_fieldnum().

Parámetros

result

An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).

field

The name of the field. The given name is treated like an identifier in an SQL command, that is, it is downcased unless double-quoted.

Valores devueltos

The field number (numbered from 0), or -1 on 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 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 sería:

Column 'title' is field number: 2

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