(PHP 5 >= 5.2.0, PHP 7)
Checks if variable of specified type exists
bool filter_has_var ( int $type, string $variable_name )
Parameters:
type
One of INPUT_GET
, INPUT_POST
, INPUT_COOKIE
, INPUT_SERVER
, or INPUT_ENV
.
variable_name
Name of a variable to check.
Returns:
Returns TRUE
on success or FALSE
on failure.
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