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Please note: This site is an archive and kept for historical purposes. Some links may be broken. Dates refer to 2001-2002.
The PHPA project became the basis for the ionCube Encoder software, and PHPA has been discontniued as a product in its own right.

"WOW! I must say that PHP Accelerator is one of the best pieces of software that I have used in a long long time. ... Simply Amazing!" - Sumbry

Faster PHP in an Instant

The ionCube PHP Accelerator is an easily installed PHP Zend engine extension that provides a PHP cache, and is capable of delivering a substantial acceleration of PHP scripts without requiring any script changes, loss of dynamic content, or other application compromises.

Unlike scripting languages such as Microsoft ASP1, compilation of any unchanged scripts is entirely eliminated when PHPA is installed, and so a typical PHP request incurs no compilation overhead at all.

PHPA is free, and not only the top performing non-commercial solution of its kind, but also a match for the commercial alternatives. Delivering typically up to a 5 times speed gain and with a near 10 times speed-up measured with some Smarty based applications, sites such as Yahoo! have found PHPA to be the ideal PHP script caching solution. The testimonials give some user reactions to PHPA.

The PHPA project is now well established, and remains ongoing and active in its aim to offer the PHP user community with not only the most desirable and effective acceleration technology, but also thorough, timely and detailed support. (Read some support testimonials)

Latest News

 Support for PHP 4.4 on Linux (Jul 20-05)

PHPA is now available for PHP 4.4 on x86 Linux. Going forward, PHPA may be replaced by a new accelerator product in the coming months.

Version 1.3.3r2 builds for Solaris, FreeBSD and Linux and PHP 4.3.0 (Jan 14-03)

Linux, FreeBSD and Solaris all brought up to 1.3.3r2 and available for the official PHP 4.3.0 release.

Version 1.3.3 Released for Solaris 2.8 (16 Oct)

Solaris builds are now available.

Version 1.3.3 Released (28 Sep)

Version 1.3.3 is now released for most supported platforms and incorporates minor fixes and modifications to the 1.3.2 releases.

Online Forum Now Available (30 Aug)

The folks at have setup an online PHPA forum for PHPA users to discuss PHPA related issues. A section is also available for hosting providers offering PHPA in their hosting plans to freely advertise themselves.

Linux Format Magazine distribute PHPA on CD (22 Aug)

Linux Format magazine are now distributing PHPA 1.3.1 on their CD in the UK (although this is without seeking prior approval). As this is not the latest release, please be sure to pick up the latest version if you have previously obtained PHPA from their CD.

PHPA Version 1.3.2 Revision 2 Released (8 Aug)

This revision to release 1.3.2 makes setting up PHPA easier, removing a step that has been required in all earlier releases (many thanks to Yahoo! for providing this change), and now ships a tuned version of the Accelerator that can deilver higher performance than regular libraries on some platforms. The standard library is provided as well.

The main change in the release 1.3.2 family is the removal of activation keys, and there are a few enhancements and minor bug fixes.

The ionCube PHP Encoder goes Live! (22 July)

The ionCube PHP Encoder has finally hit the web, and offers the first truly cost effective PHP encoding solution for code protection and data hiding. Through the convenience of a unique online portal, the service offers the best combination of simplicity, price and algorithm protection of any PHP Encoding product available in the marketplace today. Key features are compiled code encoding rather than the more common source code hiding, a decoder extension for full support of normal and PHP safe mode execution, fast encoded files (faster than raw source in early benchmarks), full PHP compatability, and compatibility with the next release of PHPA.

The next PHPA, version 1.3.2, is planned to be released this week, and along with minor updates, is designed to provide secure interoperability with the encoded file decoder by not caching encoded files; it would be a security risk to do so. Version 1.4 of PHPA is likely to support secure caching of encoded files if this was chosen at encoding time.

Activation keys to be removed! (21 June)

Since its introduction, the PHPA activation key has been a controversial feature, but a vital part of the continuing process of product improvement for PHPA. Not only has it been a useful measure of interest in PHPA, it's been integral to the process of obtaining feedback, and having people's experiences be used as part of a continuous improvement process.

However as PHPA has matured, they have served their purpose and all releases from 1.3.2 onwards will be 'activation key free'.

PHPA to support Encoded PHP Files (18 June)

There's a new and interesting PHP Encoder project on the horizon, and version 1.4 of PHP Accelerator will be including support for accelerating the encoded files of this new encoder. There are a number of encoders on the market, offering different degrees of protection and features, and varying vastly in price. This encoding solution is rather different from them all, and by offering online encoding, is possibly the future for people looking for an affordable but secure encoding solution.

To capture the relationship of both PHPA and PHPE, ionCube has been specially created to carry both these and other products into the future.

 Yahoo! go with PHPA (13 June)

Yahoo! have been testing PHPA for some months whilst exploring PHP caching solutions, and have selected PHPA as a caching solution for PHP projects.

Build for Tru64 Unix Available (7 June)

A build of PHPA Version 1.3.1pre3 for Tru64 Unix is now available, and works on OS version 4.0G, 5.0, 5.1.

PHPA, APC, AfterBurner Comparisons (28 May)

A recent article entitled Study and Optimisation of a Web Server presents the results of performance comparisons between PHPA and other popular caching systems, and concludes that PHPA outperforms the others by a wide margin. More performance information is presented on the performance page.

Builds for PHPA 1.3.1 released for i386 OpenBSD 3.0 (20 May)

Builds for i386 OpenBSD 3.0 are now available for PHP 4.1.2 and PHP 4.2.1.

PHPA 1.3.1 available for Linux and Solaris 2.8 (16 May)

Pre-release builds of version 1.3.1 are now available for Linux. Version 1.3.1 squeezes a little more performance out of the PHP engine than version 1.2p4, and performs better than 1.3.0.

Paper on PHPA Internals (11 May)

A request was recently made by for a short paper describing PHPA, and to be featured in a forthcoming journal of theirs. The paper presents an insight into the architecture and code optimiser of PHPA 1.2, and is available now in word and pdf formats.

Version 1.3.0 Released for Linux and FreeBSD 4.5 (6 May)

Version 1.3.0 is now released for Linux and FreeBSD 4.5. This release incorporates many changes over the 1.2 releases. There are minor changes, as well as some internal enhancements and redesign to the shared memory cache. Full details are available in the release notes.

Recent News

Builds for 1.2p4 released for PHP 4.2.0 on Linux (22 Apr)

Builds of PHPA 1.2p4 are now available for PHP 4.2.0 on Linux. Builds for other platforms for PHP 4.2.0 will be available when PHPA 1.3 is complete.

Builds for 1.2p4 released for Solaris, FreeBSD 4.4 and OpenBSD 3.0 (24 Mar)

Version 1.2p4 Released (23 Mar)

Version 1.2p4 is released for Linux and FreeBSD 4.5. Builds for other supported platforms will be added soon. This offers significantly enhanced support and resiliency for sites that experience occasional server crashes, adds some new features including better support for setting multiple activation keys, fixes a bug that could cause problems for very heavily loaded sites as well as some other minor fixes.

New Releases (3 Mar)

The first downloads for i386 Solaris are now available, as well as new FreeBSD and OpenBSD releases.

Version 1.2p3 released for Linux, FreeBSD 4.5, Sparc Solaris 2.8, BSDi 4.2 and OpenBSD 3.0 (26/27 Feb)

Release 1.2p3 fixes a bug that may cause incorrect operation on very heavily loaded sites.

Smarty Template Benchmarks (15 Feb)

Benchmarks of the Smarty templates system with and without acceleration using PHPA show that nearly 10 times acceleration from PHPA is possible on Smarty based applications.

PHPACA Web Front End Released (3 Feb)

Hannes Edinger has written a GUI front end to the phpa_cache_admin tool that's bundled with every release. You can obtain this and try it out at the PHPACA site .

Version 1.2 released for FreeBSD 4.3 (30 Jan)

A port of version 1.2 is now available for FreeBSD 4.3.
Builds for version 1.2p3 on several FreeBSD platforms will be available soon.

1Microsoft have introduced a concept of "Dynamic Compilation" that claims to improve the performance of ASP within the .NET framework, although not for regular ASP 3.0. However one should note that this statement still contains the word compilation. PHP with PHPA has quite simply no compilation for unchanged scripts, and may well be the preferable technology and choice.

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