![]() To follow along with the tutorial, you will need the following: So in this, reasonably short, tutorial I'm going to show you how to optimise images in PHP with only a negligible loss of quality - if any. While they can make pages and sites more engaging and attractive, though, images can significantly slow down page load speed and increase storage costs. In 2023, images make up the largest proportion of modern websites, behind videos, a proportion that has been growing for several years, since images were added to the HTML spec in 1995. Disable images for any modern website and you'll see what I mean! From product photos on an e-commerce site to staff images on a consulting firm's website, modern websites would be far less engaging without them. We use them each and every day on websites for a wide variety of purposes. webp version in Chrome and browsers that send Accept: image/webp, and. So for example when user is uploading a PNG file:Īnd then you can use URL with. If you have pngquant 1.8 on your server (just get package from official pngquant website), then you can create small fallback images (with quality better than from PHP's libgd): Regular truecolor PNG with alpha gives pretty large files, but there's a special smaller PNG file variant that can be created by pngquant - a command line utility. ![]() For WebP files with transparency it's necessary to have PNG fallback for other browsers (otherwise it won't work in iOS, Firefox, IE, etc.). WebP is a great file format, but it's basically supported only by Chrome. ![]() ![]() Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search ![]()
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