PHP Manuál | ||
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Predchádzajúci | Kapitola 6. Types | Nasledujúci |
The special NULL value represents that a variable has no value. NULL is the only possible value of type NULL.
Poznámka: The null type was introduced in PHP 4
A variable is considered to be NULL if
it has been assigned the constant NULL.
it has not been set to any value yet.
it has been unset().
Predchádzajúci | Domov | Nasledujúci |
Resource | Hore | Pseudo-types used in this documentation |