When $var is 0?
<?
$var = 0;
// Output: $var: $var not exists
if ( $var )
echo '$var: $var exists<br>';
else
echo '$var: $var not exists<br>';
// Output: isset(): var exists
if ( isset($var) )
echo 'isset(): $var exists<br>';
else
echo 'isset(): $var not exists<br>';
?>
Larry E . Ullman wrote:
if($var) do something;
verses
if(isset($var)) do something;
The simple form if($var) seems to work fine and I see it in code often.
Is there a good reason for using isset?
Yes, if you don't use isset(), you may see notices (errors) if the
variable is not set. This depends upon the error reporting settings of
the server. However, if you use isset() you won't see notices regardless.
Larry
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