note 16297 added to ref.var

The definitions above are pretty poor: empty -- Determine whether a variable is set isset -- Determine whether a variable is set The actual definitions are: empty - returns true if the variable has been declared AND HOLDS A NULL VALUE. isset - returns true if the variable has been declared, regardless of it's value. This can be done many ways for instance: by setting a value (PHP is a loosly typed language afterall,) defining it as a session variable or appending it to the query string. example: if (isset($mom)) { echo "\$mom has been declared a variable"; if (empty($mom)) { echo "\mom does not hold any value though"; } } If you did not check with isset before using empty and the variable was not declared (!isset) you would get a 'mom is undefined' error when you call the empty function (unless you used error supression.) -- http://www.php.net/manual/en/ref.var.php http://master.php.net/manage/user-notes.php?action=edit+16297 http://master.php.net/manage/user-notes.php?action=delete+16297 http://master.php.net/manage/user-notes.php?action=reject+16297