(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.2, PECL idn >= 0.1)
idn_to_utf8 — Convert domain name from IDNA ASCII to Unicode
Procedural style
$domain,$flags = IDNA_DEFAULT,$variant = INTL_IDNA_VARIANT_UTS46,&$idna_info = nullThis function converts a Unicode domain name from an IDNA ASCII-compatible format to plain Unicode, encoded in UTF-8.
domainDomain to convert in an IDNA ASCII-compatible format.
flagsConversion options - combination of IDNA_* constants (except IDNA_ERROR_* constants).
variant
Either INTL_IDNA_VARIANT_2003 (deprecated as of PHP 7.2.0) for IDNA 2003 or
INTL_IDNA_VARIANT_UTS46 (only available as of ICU 4.6) for UTS #46.
idna_info
This parameter can be used only if
INTL_IDNA_VARIANT_UTS46 was used for
variant. In that case, it will be filled with an
array with the keys 'result', the possibly illegal
result of the transformation,
'isTransitionalDifferent', a boolean indicating
whether the usage of the transitional mechanisms of UTS #46 either has
or would have changed the result and 'errors',
which is an int representing a bitset of the error
constants IDNA_ERROR_*.
The domain name in Unicode, encoded in UTF-8, or false on failure
| Version | Description |
|---|---|
| 7.4.0 |
The default value of variant is now
INTL_IDNA_VARIANT_UTS46 instead of the deprecated
INTL_IDNA_VARIANT_2003.
|
| 7.2.0 |
INTL_IDNA_VARIANT_2003 has been deprecated; use
INTL_IDNA_VARIANT_UTS46 instead.
|
Example #1 idn_to_utf8() example
<?php
echo idn_to_utf8('xn--tst-qla.de');
?>The above example will output:
täst.de