pg_field_num
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_num — Returns the field number of the named field
설명
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.
Note:
This function used to be called pg_fieldnum().
인수
-
result -
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
-
field_name -
The name of the field.
반환값
The field number (numbered from 0), or -1 on error.
예제
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');
?>
위 예제의 출력:
Column 'title' is field number: 2
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