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PHP 5.5.0 Alpha2 released

Note: This article was originally published at Planet PHP on 21 December 2012.
Planet PHP
The PHP development team announces the immediate availability of PHP 5.5.0alpha2. This release adds new features and fix some bugs from alpha1. All users of PHP are encouraged to test this version carefully, and report any bugs in the bug tracking system. THIS IS A DEVELOPMENT PREVIEW - DO NOT USE IT IN PRODUCTION! PHP 5.5.0 Alpha 2 comes with new features and improvements such as (incomplete list) : Support for using empty() on the result of function calls and other expressions, Systemtap support by enabling systemtap compatible dtrace probes on linux, Optimized access to temporary and compiled VM variables. 8% less memory reads. Please, note that this alpha version also introduces the ext/mysql depreciation. You can read the full list of changes in the NEWS file contained in the release archive. For source downloads of PHP 5.5.0 Alpha 2 please visit the download page, Windows binaries can be found on windows.php.net/qa/. Thank you for helping us making PHP better.