RewriteCond of htaccess is not working properly - apache

Question

Below is my .htaccess file:
Options -Indexes
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^api/(.*)$ api/index.php/api/$1 [L]
RewriteRule ^lib/(.*) lib/$1 [QSA,L]
RewriteRule ^applications/(.*) applications/$1 [QSA,L]
RewriteRule ^([^\/]*)/index.php /lib/vt-index.php?clientid=$1 [QSA,L]
RewriteRule ^([^\/]*)/([^?]*) /lib/vt/$2?clientid=$1 [QSA]
I have some issues:
lib and applications are folders, but RewriteCond %{REQUEST_FILENAME} !-d has no effect, I have to write condition for lib and application separately.
The main issue is my api calls are not giving me result. I am calling my api as www.myweb.com/api/User/xyz%40gmail.com which is redirecting to www.myweb.com/api/index.php/api/User/xyz%40gmail.com, which is right. But calls to this are blank.

Answer 1

A RewriteCond only gets applied to the immediately following RewriteRule. Conditions aren't set globally nor get applied to more than one rule. You'll either need to repeat the condition for each rule:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^api/(.*)$ api/index.php/api/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^lib/(.*) lib/$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^applications/(.*) applications/$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^\/]*)/index.php /lib/vt-index.php?clientid=$1 [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^\/]*)/([^?]*) /lib/vt/$2?clientid=$1 [QSA]
Or you can negate the condition and let it pass through first:
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^api/(.*)$ api/index.php/api/$1 [L]
RewriteRule ^lib/(.*) lib/$1 [QSA,L]
RewriteRule ^applications/(.*) applications/$1 [QSA,L]
RewriteRule ^([^\/]*)/index.php /lib/vt-index.php?clientid=$1 [QSA,L]
RewriteRule ^([^\/]*)/([^?]*) /lib/vt/$2?clientid=$1 [QSA]
This way, the opposite of your conditions get applied to a rule that simply says "do nothing, and no more rewriting". In order for any of the bottom 5 rules to get applied, the conditions at the top would not have been met.