Justin French wrote:
>on 30/09/02 2:44 PM, Jeff Bluemel ([EMAIL PROTECTED]) wrote:
>>how to I test for a null value?
>empty()? isset()? if($var == "")? if($var == "NULL")?? have a look in
>the php manual for string functions, and comparison operators
I think he maybe meant testing for null values in SQL.
If this is true, there is the null keyword: "is null" and "is not null".
select * from table_name where column_name is not null
This selects all rows from a table where the data in column column_name
is not null. Be careful with this, as it actually tests for null and not
an empty string, for example. If you want to test whether a value is
null once you have assigned it to a PHP variable, you can use one of
In addition, PHP has null as well.
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