Came across this. Seems interesting.
From link below :
Oracle and Zend Technologies have partnered to produce Zend Core for Oracle, a fully tested and supported, free download that will deliver tight integration between Oracle Database and Zend's supported PHP environment.
Technical information about the use of PHP in conjunction with enterprise-class Oracle technology. : http://www.oracle.com/technology/tech/php/index.html
PHP Developer Center at Oracle with Zend
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