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<?php
namespace Punic;
/**
* Numbers helpers.
*/
class Phone
{
/**
* Retrieve the list of the country calling codes for a specific country.
*
* @param string $territoryCode The country identifier ('001' for global systems, for instance satellite communications like Iridium)
*
* @return array Returns the list of country calling codes found for the specified country (eg: for 'US' you'll get array('1'))
*/
public static function getPrefixesForTerritory($territoryCode)
{
$result = array();
if (is_string($territoryCode) && preg_match('/^([a-z]{2}|[0-9]{3})$/i', $territoryCode)) {
$territoryCode = strtoupper($territoryCode);
$data = Data::getGeneric('telephoneCodeData');
if (isset($data[$territoryCode])) {
$result = $data[$territoryCode];
}
}
return $result;
}
/**
* Retrieve the list of territory codes for a specific prefix.
*
* @param string $prefix The country calling code (for instance: '1')
*
* @return array Returns the list of territories for which the specified prefix is applicable (eg: for '1' you'll get array('US', 'AG', 'AI', 'CA', ...))
*/
public static function getTerritoriesForPrefix($prefix)
{
$result = array();
if (is_string($prefix) && preg_match('/^[0-9]+$/', $prefix)) {
$data = Data::getGeneric('telephoneCodeData');
foreach ($data as $territoryCode => $prefixes) {
if (in_array($prefix, $prefixes)) {
$result[] = $territoryCode;
}
}
}
return $result;
}
/**
* Retrieve the max length of the country calling codes.
*
* @return int
*/
public static function getMaxPrefixLength()
{
static $result;
if (!isset($result)) {
$maxLen = 0;
$data = Data::getGeneric('telephoneCodeData');
foreach ($data as $territoryCode => $prefixes) {
foreach ($prefixes as $prefix) {
$len = strlen($prefix);
if ($maxLen < $len) {
$maxLen = $len;
}
}
}
$result = $maxLen;
}
return $result;
}
}