80 WordPress sites, one OPcache: eleven days in production
In part one, an OPcache patch stored the identical bytecode of 80 WordPress sites only once, and nearly halved the cache's memory over a one-million-request ben…
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Blog Vitalyn
SEO, web development
SEO, web development
& Linux
Tips, tutorials and lessons learned by the Vitalyn team.
80 WordPress sites, one OPcache
Hosting our clients' websites means taking on technical challenges every day. Today I'd like to share one of them, which led us to build a patch for PHP that is…
Read the articleHow much does a website cost in 2026? Prices and comparison
Showcase site, e-commerce, custom build: how much should you budget for a website in 2026? Detailed prices, a comparison and tips to choose the right option.…
Read the articleChatGPT cites your competitor, not you: how to turn the tables with GEO
GEO (Generative Engine Optimization) is the new frontier of search optimization: optimizing your site to be cited by ChatGPT, Perplexity and AI engines. Find ou…
Read the articleTyping accented capital letters on Windows
Struggling to type an accented capital letter on Windows? Here is a complete guide to the Alt code shortcuts.…
Read the articleUnderline text below the text in CSS
Context: we want to underline a text below the text. Modern CSS properties will help us: text-decoration-line: underline; text-decoration-style: solid; t…
Read the articleAdd a post type condition in Elementor Pro (template editing)
With ACF Pro you can now create taxonomies and post types. However, when building a template, it can be hard to figure out how to assign a template …
Read the articleHow do you change the color of a radio input?
By using the accent-color property! Example: accent-color: #232323; Please note: at the time of writing, this property is not (yet) supported by all…
Read the articleX (formerly Twitter): refresh the share image (Card)
How do you refresh the preview or share image on X (formerly Twitter)?…
Read the articleNotice: Undefined variable in PHP
What does this error mean? Notice: Undefined variable in PHP …
Read the articleThe grep command on Linux
grep on Linux, a remarkably useful command that will save you loads of time.…
Read the articleLinux: list the files and folders in a directory by date
How to list the files and folders in a directory by date…
Read the articleHow to prevent SQL injection in PHP
Preventing SQL injection in PHP: best practices.…
Read the articleLinux: find the size of the folders and files in a directory
Linux: find the size of the folders and files in a directory…
Read the articleElementor popup + Contact Form 7: keep the popup open
How to keep a popup open with Contact Form 7 and Elementor…
Read the articleCSS: rotate an image indefinitely
How to rotate an image, icon, div or any other element through 360 degrees.…
Read the articleHow to write meta descriptions for SEO
What is a meta description? How do you write one? Why do meta descriptions matter? Do they actually help with search engine optimization?…
Read the articleCheck if a variable exists and is not empty in PHP
Check if a variable exists and is not empty in PHP. empty, isset and other PHP functions for checking a variable.…
Read the articleThe title tag in SEO
SEO best practices: how to optimize the title tag.…
Read the articleHow to display random posts in WordPress
A simple function to fetch 10 random posts in WordPress…
Read the articleHow to create a circle that follows the cursor using javascript and css
Create a circle that follows the cursor with javascript and css.…
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