Re: syntax question

From: Date: Mon, 30 Sep 2002 05:29:45 +0000
Subject: Re: syntax question
References: 1  Groups: php.general 
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Justin French wrote:
on 30/09/02 2:44 PM, Jeff Bluemel (jeff@domintcom.com) 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 Justin's suggestions. In addition, PHP has null as well. Happy hacking. Chris

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