PostgreSQL Functions
PHP Manual

pg_field_num

Returns the field number of the named field

Description

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

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:

Column 'title' is field number: 2

See Also

  • pg_field_name