The PHP development team is proud to announce the availability of the first release candidate of PHP 5.3.0 (PHP 5.3.0RC1). This release marks the final phase in a major improvement in the 5.X series, which includes a large number of new features, bug fixes and security enhancements.The key features of the PHP 5.3 branch include:Support for namespacesUnder the hood performance improvementsLate static bindingLambda functions and closures Syntax additions: NOWDOC, limited GOTO, ternary short cut "?:" and __callStatic() Optional garbage collection for cyclic referencesOptional mysqlnd PHP native replacement for libmysqlImproved windows support including VC6 and VC9 binariesMore consistent float roundingDeprecation notices are now handle via E_DEPRECATED (part of E_ALL) instead of the E_STRICT error levelSeveral enhancements to enable more flexiblity in php.ini (and ini parsing in general)New bundled extensions: ext/phar, ext/intl, ext/fileinfo, ext/sqlite3, ext/enchant Countless bug fixes and improvements to existing extensions in particular to: ext/openssl, ext/spl and ext/date This release also drops several extensions and unifies usage of internal APIs. Users should be aware of the following known backwards compatibility breaks:Parameter parsing API unification will cause some functions to behave more or less strict when it comes to type jugglingRemoved the following extensions: ext/mhash (see ext/hash), ext/msql, ext/pspell (see ext/enchant), ext/sybase (see ext/sybase_ct) Moved the following extensions to PECL: ext/ming, ext/fbsql, ext/ncurses, ext/fdf Removed zend.ze1_compatibility_modeSee the upgrading guide for other minor changesAll users of PHP, especially those using earlier PHP 5 releases are advised to test this release as the final release of PHP 5.3.0 will eventually obsolete the 5.2 branch of PHP.For users upgrading from previous PHP 5 releases there is an upgrading guide available here, detailing the changes between those releases and PHP 5.3.0.Please also note that we are aware of issues surrounding float/integer handling in some edge cases (some of which have been introduced in PHP 5.2.0), as well as a crash bug in NSAPI, that will be fixed in PHP 5.3.0RC2. These issues however do not prevent wide spread testing of PHP 5.3.0RC1 as users can now rely on the feature set and implementation decisions no longer being changed.For a full list of changes in PHP 5.3.0, see the CVS NEWS file.
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