where is this file?<VirtualHost 88.88.88.88:80 >
    ServerName www.sub1.domain1.com
    ServerAlias www.sub1.domain1.com sub1.domain1.com
    ServerAdmin webmaster@blog.com
    DocumentRoot /home/blog/domains/blog.com/public_html/sub1
    UseCanonicalName OFF
    <IfModule !mod_ruid2.c>
        SuexecUserGroup blog blog
    </IfModule>
    CustomLog /var/log/httpd/domains/blog.com.sub1.bytes bytes
    CustomLog /var/log/httpd/domains/blog.com.sub1.log combined
    ErrorLog /var/log/httpd/domains/blog.com.sub1.error.log
    <Directory /home/blog/domains/blog.com/public_html/sub1>
        AllowOverride AuthConfig FileInfo Indexes Limit Options=Indexes,IncludesNOEXEC,MultiViews,SymLinksIfOwnerMatch,FollowSymLinks,None
        Options -ExecCGI -Includes +IncludesNOEXEC
        <FilesMatch "\.(inc|php|phtml|phps|php56)$">
            <If "-f %{REQUEST_FILENAME}">
                #ProxyErrorOverride on
                AddHandler "proxy:unix:/usr/local/php56/sockets/blog.sock|fcgi://localhost" .inc .php .phtml .php56
            </If>
        </FilesMatch>
    </Directory>
</VirtualHost>

<VirtualHost 88.88.88.88:80 >
    ServerName www.sub1.domain2.com
    ServerAlias www.sub1.domain2.com news.domain2.com
    ServerAdmin webmaster@blog.com
    DocumentRoot /home/blog/domains/blog.com/public_html/sub1
    UseCanonicalName OFF
    <IfModule !mod_ruid2.c>
        SuexecUserGroup blog blog
    </IfModule>
    CustomLog /var/log/httpd/domains/blog.com.sub1.bytes bytes
    CustomLog /var/log/httpd/domains/blog.com.sub1.log combined
    ErrorLog /var/log/httpd/domains/blog.com.sub1.error.log
    <Directory /home/blog/domains/blog.com/public_html/sub1>
        AllowOverride AuthConfig FileInfo Indexes Limit Options=Indexes,IncludesNOEXEC,MultiViews,SymLinksIfOwnerMatch,FollowSymLinks,None
        Options -ExecCGI -Includes +IncludesNOEXEC
        <FilesMatch "\.(inc|php|phtml|phps|php56)$">
            <If "-f %{REQUEST_FILENAME}">
                #ProxyErrorOverride on
                AddHandler "proxy:unix:/usr/local/php56/sockets/blog.sock|fcgi://localhost" .inc .php .phtml .php56
            </If>
        </FilesMatch>
    </Directory>
</VirtualHost>

<VirtualHost 88.88.88.88:80 >
    ServerName www.sub1.domain3.com
    ServerAlias www.sub1.domain3.com sub1.domain3.com
    ServerAdmin webmaster@blog.com
    DocumentRoot /home/blog/domains/blog.com/public_html/sub1
    UseCanonicalName OFF
    <IfModule !mod_ruid2.c>
        SuexecUserGroup blog blog
    </IfModule>
    CustomLog /var/log/httpd/domains/blog.com.sub1.bytes bytes
    CustomLog /var/log/httpd/domains/blog.com.sub1.log combined
    ErrorLog /var/log/httpd/domains/blog.com.sub1.error.log
    <Directory /home/blog/domains/blog.com/public_html/sub1>
        AllowOverride AuthConfig FileInfo Indexes Limit Options=Indexes,IncludesNOEXEC,MultiViews,SymLinksIfOwnerMatch,FollowSymLinks,None
        Options -ExecCGI -Includes +IncludesNOEXEC
        <FilesMatch "\.(inc|php|phtml|phps|php56)$">
            <If "-f %{REQUEST_FILENAME}">
                #ProxyErrorOverride on
                AddHandler "proxy:unix:/usr/local/php56/sockets/blog.sock|fcgi://localhost" .inc .php .phtml .php56
            </If>
        </FilesMatch>
    </Directory>
</VirtualHost>