how to add expires headers in wordpress code example

Example: add expires headers wp

<IfModule mod_expires.c>

  ExpiresActive On
  # Images

  ExpiresByType image/jpeg "access plus 1 year"

  ExpiresByType image/gif "access plus 1 year"

  ExpiresByType image/png "access plus 1 year"

  ExpiresByType image/webp "access plus 1 year"

  ExpiresByType image/svg+xml "access plus 1 year"

  ExpiresByType image/x-icon "access plus 1 year"




  # Video

  ExpiresByType video/mp4 "access plus 1 year"

  ExpiresByType video/mpeg "access plus 1 year"




  # CSS, JavaScript

  ExpiresByType text/css "access plus 1 month"

  ExpiresByType text/javascript "access plus 1 month"

  ExpiresByType application/javascript "access plus 1 month"




  # Others

  ExpiresByType application/pdf "access plus 1 month"

  ExpiresByType application/x-shockwave-flash "access plus 1 month"

</IfModule>