Validate A MAC Address

Validates a value is a valid MAC address

var_dump(filter_var('FA-F9-DD-B2-5E-0D', FILTER_VALIDATE_MAC));
var_dump(filter_var('DC-BB-17-9A-CE-81', FILTER_VALIDATE_MAC));
var_dump(filter_var('96-D5-9E-67-40-AB', FILTER_VALIDATE_MAC));
var_dump(filter_var('96-D5-9E-67-40', FILTER_VALIDATE_MAC));
var_dump(filter_var('', FILTER_VALIDATE_MAC));

Results:

string(17) "FA-F9-DD-B2-5E-0D"
string(17) "DC-BB-17-9A-CE-81"
string(17) "96-D5-9E-67-40-AB"
bool(false)
bool(false)

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