Update functions_product.php to use proper naming
-rw-r--r-- 9 .gitignore
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-rw-r--r-- 18005 COPYING
-rw-r--r-- 78 CREDITS
-rw-r--r-- 1061 INSTALLING
-rw-r--r-- 1181 UPGRADING
drwxr-xr-x - admin
-rwxr-xr-x 8835 attachment.php
drwxr-xr-x - docs
-rw-r--r-- 7437 editcomment.php
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-rw-r--r-- 5780 explain.php
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drwxr-xr-x - includes
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drwxr-xr-x - install
drwxr-xr-x - locale
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drwxr-xr-x - po
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drwxr-xr-x - templates
-rw-r--r-- 10537 userctrl.php
-rwxr-xr-x 2538 viewattachment.php
-rw-r--r-- 3084 vote.php