Find the direction of a language using its locale identifier?

Question

Does ICU (php Intl extension) provides a way to detect the direction of a language (rtl/ltr) ?

Answer 1

Direction is a script data. A language can use many scripts and a script can be used by many languages, so I'm not sure you can map a language to a direction.

Even if you could, PHP provides no way to get these informations. However you can try icanboogie/cldr to see if CLDR data would be of any use (after all most languages use only one script).

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You can find here a mapping between languages and scripts and here scripts data which include direction.