variable with NULL value
| From: | OKi98 | Date: | Thu, 03 May 2007 15:22:14 +0000 |
| Subject: | variable with NULL value | ||
| Groups: | php.db | ||
| Request: | Send a blank email to php-db+get-43543@lists.php.net to get a copy of this message | ||
Hi,
one more question.
Why the variable, that contains NULL value appears to be not set. When you try to echo it the php does not produce warning about using undefined variable.
//$connection contains database connection handler
$result=mysql_query("select NULL as value",$connection);
$tmp=mysql_fetch_array($result);
$foo=$tmp["value"];
if (!isset($foo)) echo("\$foo is not set but does not produce warning -$foo-");
OKi98