The latest version 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 5.5.8.PHP 5.x includes a new OOP model based on the Zend Engine 2.0, a new extension for improved MySQL support, built-in native support for SQLite, and much more.
According to the changelog, the validation of class names has been added in the autoload process, invalid C code has been fixed in zend_strtod.c, and passing DOMDocumentFragment to DOMDocument::saveHTML() no longer produces invalid markup.
Also, an integer overflow in exif_read_data() has been fixed, freetype-config is now used for determining freetype2 dir(s), and the stack smashing protection no longer kills the PDO/ODBC queries.
You can check out the official changelog in the readme file incorporated in the source package for more details about this release. Download PHP 5.5.8 right now from Softpedia.