Sorting array with special character (accent)

What’s the easiest way to sort array with accent?

Since PHP 5.3 you can use the Internationalization extension (intl). It’s a wrapper for ICU library.

So you have to check the PHP Extension Intl is installed on your server.

If you have it, it should be something like this:

$collator = new Collator('fr_FR');

If its ain’t working, try locale -a and you will see which one are installed.
If you want to install one:

Ubuntu: /> locale-gen fr_FR
Gentoo: /> Edit the file /etc/locale.gen and run locale-gen (may need sudo)

What can i do without the intl extension?

setLocale(LC_COLLATE, 'fr_FR.utf8');
asort($array, SORT_LOCALE_STRING);

To use this flag, you will need PHP >= 5.0.2 OR PHP 4.4.0