Warning: Do not use this method for do-your-own formatting - for some regions, the national dialling prefix is used only for certain types of numbers. Use the library's formatting functions to prefix the national prefix when required.
| public getNddPrefixForRegion ( string $regionCode, boolean $stripNonDigits ) : string | ||
| $regionCode | string | the region that we want to get the dialling prefix for |
| $stripNonDigits | boolean | true to strip non-digits from the national dialling prefix |
| return | string | the dialling prefix for the region denoted by regionCode |
public function testGetNationalDiallingPrefixForRegion()
{
$this->assertEquals("1", $this->phoneUtil->getNddPrefixForRegion(RegionCode::US, false));
// Test non-main country to see it gets the national dialling prefix for the main country with
// that country calling code.
$this->assertEquals("1", $this->phoneUtil->getNddPrefixForRegion(RegionCode::BS, false));
$this->assertEquals("0", $this->phoneUtil->getNddPrefixForRegion(RegionCode::NZ, false));
// Test case with non digit in the national prefix.
$this->assertEquals("0~0", $this->phoneUtil->getNddPrefixForRegion(RegionCode::AO, false));
$this->assertEquals("00", $this->phoneUtil->getNddPrefixForRegion(RegionCode::AO, true));
// Test cases with invalid regions.
$this->assertNull($this->phoneUtil->getNddPrefixForRegion(null, false));
$this->assertNull($this->phoneUtil->getNddPrefixForRegion(RegionCode::ZZ, false));
$this->assertNull($this->phoneUtil->getNddPrefixForRegion(RegionCode::UN001, false));
// CS is already deprecated so the library doesn't support it.
$this->assertNull($this->phoneUtil->getNddPrefixForRegion(RegionCode::CS, false));
}