Interview Questions
Q.

What is a PHP accelerator?

 


Answer :
Most PHP accelerators work by caching the compiled bytecode of PHP scripts to avoid the overhead of parsing and compiling source code on each request (some or all of which may never even be executed). To further improve performance, the cached code is stored in shared memory and directly executed from there, minimizing the amount of slow disk reads and memory copying at runtime.
For more details :http://en.wikipedia.org/wiki/PHP_accelerator

List of PHP accelerators
1. APC (Alternative PHP Cache) – http://pecl.php.net/package/APC
2. eAccelerator – http://eaccelerator.net/
3. XCache – http://trac.lighttpd.net/xcache/
4.ionCube PHP Accelerator - http://www.php-accelerator.co.uk
5. Turck MMCache - http://turck-mmcache.sourceforge.net/index_old.html
6.Nusphere PhpExpress - http://www.nusphere.com/products/phpexpress.htm
7. Zend Optimizer+ - http://www.zend.com/products/server/
8. Zend Platform - http://www.zend.com/products/platform
9. Windows Cache Extension for PHP - http://www.iis.net/expand/WinCacheForPHP
10. Other software - http://www.zend.com/products/guard/optimizer/
Posted By : jon
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