Php/docs/function.pg-field-is-null
pg_field_is_null
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_is_null — Test if a field is SQL NULL
Description
pg_field_is_null
( resource $result
, int $row
, mixed $field
) : int
pg_field_is_null
( resource $result
, mixed $field
) : int
pg_field_is_null() tests if a field in a PostgreSQL
result resource is SQL NULL or not.
Note:
This function used to be called pg_fieldisnull().
Parameters
result- PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
row- Row number in result to fetch. Rows are numbered from 0 upwards. If omitted, current row is fetched.
field- Field number (starting from 0) as an int or the field name as a string.
Return Values
Returns 1 if the field in the given row is SQL NULL, 0
if not. FALSE is returned if the row is out of range, or upon any other error.
Examples
Example #1 pg_field_is_null() example
<?php $dbconn = pg_connect("dbname=publisher") or die ("Could not connect"); $res = pg_query($dbconn, "select * from authors where author = 'Orwell'"); if ($res) { if (pg_field_is_null($res, 0, "year") == 1) { echo "The value of the field year is null.\n"; } if (pg_field_is_null($res, 0, "year") == 0) { echo "The value of the field year is not null.\n"; } }?>
