Requests_IDNAEncoder::to_ascii( string $string )
Convert a UTF-8 string to an ASCII string using Punycode
Parameters
- $string
-
(Required) ASCII or UTF-8 string (max length 64 characters)
Return
(string) ASCII string
Source
File: wp-includes/Requests/IDNAEncoder.php
public static function to_ascii($string) {
// Step 1: Check if the string is already ASCII
if (self::is_ascii($string)) {
// Skip to step 7
if (strlen($string) < 64) {
return $string;
}
throw new Requests_Exception('Provided string is too long', 'idna.provided_too_long', $string);
}
// Step 2: nameprep
$string = self::nameprep($string);
// Step 3: UseSTD3ASCIIRules is false, continue
// Step 4: Check if it's ASCII now
if (self::is_ascii($string)) {
// Skip to step 7
if (strlen($string) < 64) {
return $string;
}
throw new Requests_Exception('Prepared string is too long', 'idna.prepared_too_long', $string);
}
// Step 5: Check ACE prefix
if (strpos($string, self::ACE_PREFIX) === 0) {
throw new Requests_Exception('Provided string begins with ACE prefix', 'idna.provided_is_prefixed', $string);
}
// Step 6: Encode with Punycode
$string = self::punycode_encode($string);
// Step 7: Prepend ACE prefix
$string = self::ACE_PREFIX . $string;
// Step 8: Check size
if (strlen($string) < 64) {
return $string;
}
throw new Requests_Exception('Encoded string is too long', 'idna.encoded_too_long', $string);
}