(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.2, PECL idn >= 0.1)
idn_to_ascii — Convert domain name to IDNA ASCII form
过程化风格
$domain
[, int $options = IDNA_DEFAULT
[, int $variant = INTL_IDNA_VARIANT_UTS46
[, array &$idna_info
]]] ) : stringThis function converts a Unicode domain name to an IDNA ASCII-compatible format.
domainThe domain to convert, which must be UTF-8 encoded.
optionsConversion 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 encoded in ASCII-compatible form, 或者在失败时返回 FALSE
| 版本 | 说明 |
|---|---|
| 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.
|
| 5.4.0/PECL 2.0.0b1 |
Added the parameters variant and
idna_info; UTS #46 support (requires ICU ≥ 4.6).
|
Example #1 idn_to_ascii() example
<?php
echo idn_to_ascii('täst.de');
?>
以上例程会输出：
xn--tst-qla.de