Przykłady isset";
$name = "J-23";
echo "name = J-23 - isset(name) zwraca: ";
var_dump(isset($name));
echo "
surname nie istnieje - isset(surname) zwraca: ";
var_dump(isset($surname));
echo "
name = null - isset(name) zwraca: ";
$name = null;
var_dump(isset($name));
echo "
name = '' - isset(name) zwraca: ";
$name = "";
var_dump(isset($name));
echo "
name = false - isset(name) zwraca: ";
$name = false;
var_dump(isset($name));
echo "
name = true - isset(name) zwraca: ";
$name = true;
var_dump(isset($name));
echo "
name = 0 - isset(name) zwraca: ";
$name = 0;
var_dump(isset($name));
// empty
echo "Przykłady empty
";
echo "name = false - empty(name) zwraca: ";
$name = false;
var_dump(empty($name));
echo "
surname nie istnieje - empty(surname) zwraca: ";
var_dump(empty($surname));
echo "
name = null - empty(name) zwraca: ";
$name = null;
var_dump(empty($name));
echo "
name = 0 - empty(name) zwraca: ";
$name = 0;
var_dump(empty($name));
echo "
name = '' - empty(name) zwraca: ";
$name = '';
var_dump(empty($name));
echo "
name = false - empty(name) zwraca: ";
$name = false;
var_dump(empty($name));
echo "
name = 365 - empty(name) zwraca: ";
$name = 365;
var_dump(empty($name));
// not empty
echo "Przykłady !empty
";
echo "name = 365 - !empty(name) zwraca: ";
$name = 365;
var_dump(!empty($name));
?>