(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_is_null — �����ֶ��Ƿ�Ϊ NULL
pg_field_is_null() �����ֶ��Ƿ�Ϊ NULL������ֶ��ڸ���������Ϊ NULL �� 1������ֶ��ڸ��������в��� NULL �� 0���ֶο������е������ţ����֣���ʽ������Ҳ�������ֶ������ַ�������ʽ�������еı�Ŵ� 0 ��ʼ��
Example #1 pg_field_is_null() ����
<?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";
}
}
?>
Note:
��������ǰ������Ϊ pg_fieldisnull()��