Php/docs/function.idn-to-ascii

• PHP Manual
• IDN 函数
• Convert domain name to IDNA ASCII form

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

idn_to_ascii ( string $domain [, int $options = IDNA_DEFAULT [, int $variant = INTL_IDNA_VARIANT_UTS46 [, array &$idna_info ]]] ) : string|false

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_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_*.

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.

范例

Example #1 idn_to_ascii() example

<?phpecho idn_to_ascii('täst.de'); ?>

以上例程会输出：

xn--tst-qla.de

参见

• idn_to_utf8() - Convert domain name from IDNA ASCII to Unicode