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What Is a User-Agent String and How to Read It
The Toolz user agent parser takes a User-Agent string and splits it into browser, rendering engine, operating system, device type, and CPU architecture.
JSON to Array in PHP: json_decode or a Literal?
The Toolz JSON to PHP array converter parses a JSON document and serialises it as a PHP array literal you can paste straight into a file.
What Is an SMS QR Code and How Does SMSTO Work?
An SMS QR code encodes an SMSTO: payload, so scanning it with a phone camera opens the messaging app with the recipient number and, optionally, a message body already filled in.
Hreflang x-default: What It Is and When to Use It
x-default is the hreflang value that names the page to serve when none of your other language or region entries match the user.
Hreflang Tags Explained: A Complete Guide
An hreflang tag is a rel="alternate" hreflang="xx-XX" annotation that tells search engines which language and regional version of a page to serve each user.
CSS Generators: Shadows, Radius, Filters and Glass Effects Without Guessing
Use Box Shadow for depth, Text Shadow for glow and outlines, Border Radius for corners including the elliptical ones, CSS Filters for blur, brightness and colour effects, Glassmorphism for frosted panels, Neumorphism for soft raised surfaces, Gradients for backgrounds, and the CSS Unit Converter when you need px in rem.
JSON Escape and Unescape: Embed Any Text in JSON Without Breaking It
A JSON string cannot contain a raw double quote, a raw backslash, or raw control characters like newlines and tabs.
How to Add, Multiply and Divide Fractions
To add or subtract fractions, put them over a common denominator, combine the numerators, then reduce. To multiply, multiply across the top and the bottom.
What Is TDEE? How to Find Maintenance Calories
Your TDEE is roughly your BMR (the calories you burn at rest) multiplied by an activity factor between 1.2 and 1.9. Eat around your TDEE to maintain weight, below it to lose, above it to gain.