php - htaccess redirect add querystring -

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i'm triying redirect www.myweb.com www.myweb.com/?lang=en
try made redirect traffic in website or creates loop.
help?

i thinkg should easier set variable lang 'en' in php, rather redirecting... in code, before handling lang variable, try:

if (!isset($_get['lang'])) {     $_get['lang'] = 'en; }

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