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PHP is a scripting language for creating websites.

The Apache HTTP Server is an open source web server by the Apache Software Foundation.

Linux is a Unix-like open source operating system originally developed by Linus Torvalds.

Gigaserver is a Czech web hosting provider owned by Seonet.

Gigaserver is a Czech web hosting provider owned by Seonet.

Gigaserver is a Czech web hosting provider owned by Seonet.

Email Profi is a Czech email service provider owned by Seznam.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Gzip (GNU zip) is a file compression algorithm.

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Strict version of XHTML.

Windows-1250 is an 8-bit character encoding, designed to cover Central European and Eastern European languages that use Latin script.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

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