pg_field_is_null
(PHP 4 >= 4.2.0, PHP 5)
pg_field_is_null -- Test if a field is
NULLDescription
int
pg_field_is_null ( resource result, int row, mixed field)
pg_field_is_null() tests if a field is NULL or
not. It returns 1 if the field in the given row is NULL. It
returns 0 if the field in the given row is NOT NULL. Field can
be specified as column index (number) or fieldname (string). Row
numbering starts at 0.
Пример 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";
}
}
?>
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Замечание:
This function used to be called pg_fieldisnull().
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