W3cubDocs

/PHP

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

Description

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.

Note:

This function used to be called pg_fieldnum().

Parameters

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.

Return Values

The field number (numbered from 0), or -1 on error.

Changelog

Version	Description
8.1.0	The `result` parameter expects an PgSql\Result instance now; previously, a resource was expected.

Examples

Example #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');
?>

The above example will output: