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Asked: 2026-06-15T07:47:44+00:00

I’ve installed the intl extension via PECL on Debian Squeeze. But when I put

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I’ve installed the intl extension via PECL on Debian Squeeze. But when I put extension=intl.so in my php.ini file and restart Apache, it loads CP to about 99% and nothing works. The only way to make the server work again is to remove the extension=intl.so line from php.ini file. Why?

Apache error log is:

[Wed Nov 28 23:09:59 2012] [notice] suEXEC mechanism enabled (wrapper:
/usr/lib/apache2/suexec) PHP Warning: Function registration failed –
duplicate name – idn_to_ascii in Unknown on line 0 PHP Warning:
Function registration failed – duplicate name – idn_to_utf8 in Unknown
on line 0 PHP Warning: idn: Unable to register functions, unable to
load in Unknown on line 0

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1 Answer

  1. Editorial Team

    function names need to be unique for obvious reasons.

    The (recommended) extension intl provides the functions idn_to_ascii and idn_to_utf8 (along with other helpful functions), as well as the pecl extension idn (source)

    idn is in (early) beta since 2009 and no longer developed.

    How do I fix that??

    What you have to do is to uninstall your idn extension

    apt-get remove php-pecl-idn

    or ( depends how this was installed )

    pecl uninstall idn

    or simply comment the the extension in your config 

    ; extension=idn.so

    then restartart your apache

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