Fast, stable PHP opcode cacher

 XCache is a fast, stable PHP opcode cacher that has been tested and
 is now running on production servers under high load. It overcomes a
 lot of problems that has been with other competing opcachers such as
 being able to be used with new PHP versions.
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 PHP5 is an HTML-embedded scripting language. Much of its syntax is borrowed
 from C, Java and Perl with a couple of unique PHP-specific features thrown
 in. The goal of the language is to allow web developers to write
 dynamically generated pages quickly.