pg_field_num
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_field_num — Returns the field number of the named field
Descripción
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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