isViablePhoneNumber() 공개 정적인 메소드

This method does not require the number to be normalized in advance - but does assume that leading non-number symbols have been removed, such as by the method extractPossibleNumber.
public static isViablePhoneNumber ( string $number ) : boolean
$number string to be checked for viability as a phone number
리턴 boolean true if the number could be a phone number of some sort, otherwise false
 public function testIsViablePhoneNumberNonAscii()
 {
     // Only one or two digits before possible punctuation followed by more digits.
     $this->assertTrue(PhoneNumberUtil::isViablePhoneNumber("1" . pack('H*', 'e38080') . "34"));
     $this->assertFalse(PhoneNumberUtil::isViablePhoneNumber("1" . pack('H*', 'e38080') . "3+4"));
     // Unicode variants of possible starting character and other allowed punctuation/digits.
     $this->assertTrue(PhoneNumberUtil::isViablePhoneNumber(pack('H*', 'efbc88') . "1" . pack("H*", 'efbc89') . pack('H*', 'e38080') . "3456789"));
     // Testing a leading + is okay.
     $this->assertTrue(PhoneNumberUtil::isViablePhoneNumber("+1" . pack("H*", 'efbc89') . pack('H*', 'e38080') . "3456789"));
 }