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pg_field_num
(PHP 4 >= 4.2.0, PHP 5)
pg_field_num — Returns the field number of the named field
Описание
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.
Замечание: This function used to be called pg_fieldnum().
Список параметров
- result
-
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
- field_name
-
The name of the field.
Возвращаемые значения
The field number (numbered from 0), or -1 on error.
Примеры
Пример #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');
?>
Результат выполнения данного примера:
Column 'title' is field number: 2
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