String Utils Blog

XAMPP is a free, open-source software stack that provides an all-in-one solution for web development. It includes essential components like Apache (web server), MariaDB/MySQL (database), PHP, and Perl, making it a powerful tool for local web application development and testing. XAMPP is particularly popular due to its simplicity and ease of use, even for beginners. Below, we'll guide you through the process of installing and uninstalling XAMPP on Ubuntu. Installing XAMPP on Ubuntu Download XAMPP on www.apachefriends.org/download.html . Download the Linux version of XAMPP. After downloading the package, let’s set the rights. sudo chmod 755 xampp-linux-*-installer.run Start installation sudo ./xampp-linux-*-installer.run You can see the process of installing XAMPP in Ubuntu in the video. Some instructions for work Start, reboot and stop sudo /opt/lampp/lampp start sudo /opt/lampp/lampp restart sudo /opt/lampp/lampp stop Launch GUI sudo /opt/lampp/manager-linux...

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for both humans to read and write and for machines to parse and generate. It is based on a subset of the JavaScript programming language and is used widely for transmitting data between a server and a web application, as well as for storing structured data. Despite its origins in JavaScript, JSON is language-independent, meaning it can be used in various programming environments like Python, Java, C#, and more. The structure of JSON consists of key-value pairs, where the key is always a string and the value can be a string, number, array, boolean, object, or null. JSON objects are written inside curly braces `{}`, with each key-value pair separated by a colon and different pairs separated by commas. Arrays in JSON are written inside square brackets `[]` and can contain multiple values of different types. This simple structure makes JSON highly flexible and suitable for representing complex nested ...

An online service for transliterating URLs from Cyrillic to Latin is a valuable tool for website owners and developers who work with languages that use non-Latin scripts, such as Russian, Ukrainian, or Bulgarian. When creating URLs for web pages, it's common practice to use Latin characters, as they are more universally recognized and accepted by web browsers and search engines. Transliteration services automatically convert Cyrillic text into its Latin equivalent, making URLs more readable and accessible to a global audience. This conversion process is particularly useful for improving search engine optimization (SEO). Search engines like Google and Bing index web pages more effectively when URLs contain Latin characters instead of non-standard scripts. A well-transliterated URL improves a website's visibility and ranking in search results, as Latin-based URLs are easier to parse and associate with relevant keywords. For instance, a product page with a Cyrillic URL like ...

SHA-256 (Secure Hash Algorithm 256-bit) is one of the most widely used cryptographic hash functions, offering a secure way to generate a unique, fixed-size 256-bit (32-byte) hash from data of any length. It belongs to the SHA-2 family of hash algorithms, which were developed by the National Security Agency (NSA) and published by the National Institute of Standards and Technology (NIST). As a one-way function, SHA-256 takes an input, processes it through a series of mathematical operations, and produces a 64-character hexadecimal string. One of the key properties of SHA-256 is that it is deterministic, meaning the same input will always produce the same output, but even a small change in the input results in a vastly different hash due to the "avalanche effect." SHA-256 is considered cryptographically secure, making it suitable for applications where data integrity and confidentiality are crucial. One of its main advantages is its resistance to collision attacks, where two d...

MD5, short for Message Digest Algorithm 5, is a widely recognized cryptographic hash function designed by Ronald Rivest in 1991. It takes an arbitrary-length input and produces a fixed 128-bit hash value, typically represented as a 32-character hexadecimal number. The primary purpose of MD5 was to ensure the integrity of data by detecting changes to files or messages. For instance, if even a single bit of data is altered, MD5 will produce a drastically different hash value, signaling that the data has been modified. In its early days, MD5 was extensively used for various security purposes, such as creating digital signatures, verifying file integrity, and storing hashed passwords. However, over time, significant vulnerabilities in MD5 were discovered, especially its susceptibility to collision attacks. A collision occurs when two different inputs generate the same hash value. This weakness undermined the trust in MD5 for secure cryptographic purposes. By the early 2000s, security res...

A UUID (Universally Unique Identifier) is a 128-bit identifier used in computing to uniquely identify information without relying on a central authority. Among its various versions, UUID version 4 is perhaps the most commonly used, as it generates random identifiers. In a UUID, the randomness ensures that even if millions of UUIDs are generated simultaneously across different systems, the probability of collision remains extremely low. UUID v4 consists of 32 hexadecimal characters, typically displayed in five groups separated by hyphens, like this: 123e4567-e89b-12d3-a456-426614174000. Out of the 128 bits, 122 are randomly generated, while four bits are reserved for indicating the version and variant of the UUID. One of the main strengths of UUID v4 is its simplicity. Unlike other UUID versions that may rely on timestamps or hardware addresses (like MAC addresses), version 4 purely depends on randomness. This eliminates privacy concerns that arise when UUIDs expose hardware inform...