.htaccess

# Apache Rewrite Rules
 <IfModule mod_rewrite.c>
RedirectMatch 404 ^/.+\.(ini)$
  Options +FollowSymLinks
  RewriteEngine On
  RewriteBase /

# Add trailing slash to url
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_URI} !(\.[a-zA-Z0-9]{1,5}|/|#(.*))$
  RewriteRule ^(.*)$ $1/ [R=301,L]

# Remove .php-extension from url
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME}\.php -f
  RewriteRule ^([^\.]+)/$ $1.php 

# rule 1: remove multiple leading slashes (directly after the TLD)
  RewriteCond %{THE_REQUEST} \s/{2,}
  RewriteRule (.*) $1 [R=301,L]

# rule 2: remove multiple slashes in the requested path
  RewriteCond %{REQUEST_URI} ^(.*)/{2,}(.*)$
  RewriteRule (.*) %1/%2 [R=301,L]

# POST Anti-Rewrite
RewriteCond %{REQUEST_METHOD} =POST
RewriteRule ^ - [L]

# End of Apache Rewrite Rules
 </IfModule>