idn_to_ascii
(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
说明
过程化风格
$domain [,
int $options = IDNA_DEFAULT [,
int $variant = INTL_IDNA_VARIANT_UTS46 [,
array &$idna_info ]]] ) :
string
This function converts a Unicode domain name to an IDNA ASCII-compatible format.
参数
-
domain -
The domain to convert, which must be UTF-8 encoded.
-
options -
Conversion options - combination of IDNA_* constants (except IDNA_ERROR_* constants).
-
variant -
Either
INTL_IDNA_VARIANT_2003for IDNA 2003 orINTL_IDNA_VARIANT_UTS46for 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_*.
返回值
The domain name encoded in ASCII-compatible form, 或者在失败时返回 FALSE
更新日志
| 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). |
范例
Example #1 idn_to_ascii() example
<?php
echo idn_to_ascii('täst.de');
?>
以上例程会输出：
xn--tst-qla.de
