Manußl PHP | ||
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P°edchßzejφcφ | Dal╣φ |
Returns TRUE if var exists; FALSE otherwise.
If a variable has been unset with unset(), it will no longer be isset(). isset() will return FALSE if testing a variable that has been set to NULL. Also note that a NULL byte ("\0") is not equivalent to the PHP NULL constant.
P°edchßzejφcφ | Dom∙ | Dal╣φ |
is_string | Nahoru | print_r |