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PHP file recursive change array key on find

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linux-howto

http://unix.stackexchange.com – I used PHP array $lang['module']['1'] = 'Title'; $lang['module']['2'] = 'Title2'; $lang['value'] = 'text123'; how i can use replace in terminal Key Value to CASE UPPER ? $lang['VALUE'] $lang['MODULE']['1'] $lang['MODULE']['2'] etc .. recursion find /var/www/site.net/blog/ -iname '*.php' | xargs grep -E '\$lang\[' -sl finded only $lang[ ... Please help me. (HowTos)