emptyPodręcznik PHPPoprzedniNastępnyempty (PHP 3, PHP 4 )empty -- Determine whether a variable is setDescriptionbool empty ( mixed var)Notatka: empty() is a language construct. This is the opposite of (boolean) var, except that no warning is generated when the variable is not set. See converting to boolean for more information. $var = 0; if (empty($var)) { // evaluates true echo '$var is either 0 or not set at all'; } if (!isset($var)) { // evaluates false echo '$var is not set at all'; } Note that this is meaningless when used on anything which isn't a variable; i.e. empty (addslashes ($name)) has no meaning since it would be checking whether something which isn't a variable is a variable with a FALSE value. See also isset() and unset(). PoprzedniSpis treściNastępnydoublevalPoczątek rozdziałufloatval