idn_to_ascii
(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.2, PECL idn >= 0.1)
idn_to_ascii — Convert domain name to IDNA ASCII form
Description
Procedural style
string
$domain,int
$flags = IDNA_DEFAULT,int
$variant = INTL_IDNA_VARIANT_UTS46,array
&$idna_info = null): string|false
This function converts a Unicode domain name to an IDNA ASCII-compatible format.
Parameters
-
domain -
The domain to convert, which must be UTF-8 encoded.
-
flags -
Conversion 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 orINTL_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_UTS46was used forvariant. 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_*.
Return Values
The domain name encoded in ASCII-compatible form, or false on failure
Changelog
| 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.
|
Examples
Example #1 idn_to_ascii() example
<?php
echo idn_to_ascii('täst.de');
?>
The above example will output:
xn--tst-qla.de
