The latest versions of PHP can be downloaded from Softpedia
PHP, an HTML-embedded scripting language with syntax borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in, has been updated to version 5.5.0 Beta 1.Highlights for PHP 5.5.0 Beta 1:
• The Zend Opcache extension has been added, but it's not enabled by default;
• An array_column function that returns a column in a multidimensional array has been added;
• Support for non-scalar Iterator keys in foreach has been implemented;
• Users can now change the process' title in CLI/CLI-Server SAPIs.
You can check out the official changelog in the readme file incorporated in the source package.
Download PHP 5.5.0 Beta 1 right now from Softpedia. Remember that this is a beta version and it should NOT be installed on production machines. It is intended for testing purposes only.