How to force a piece of text to be 'direction ltr' inside a 'direction rtl' paragraph

Question

So, phone numbers are always ltr (left to right).

Working on a multilingual website I need to insert a phone number (with a \'+\' prefix and numbers separated by \'-\')

Answer 1

You can use a unicode directionality marker character just before the + sign to give the algorithm the hint it needs.

These are:

LTR: 0x200E
RTL: 0x200F

So:

Please call to ‏+44-123-321 for some help

See this SO answer for more details.