FILTER_HAS_VAR(3) 1 FILTER_HAS_VAR(3) filter_has_var - Checks if variable of specified type existsSYNOPSISbool filter_has_var (int $type, string $variable_name)DESCRIPTIONPARAMETERSo $type - One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, or INPUT_ENV. o $variable_name - Name of a variable to check.RETURN VALUESReturns TRUE on success or FALSE on failure. PHP Documentation Group FILTER_HAS_VAR(3)
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