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I am trying to setup PHP on Apache Tomcat 7 using these notes. I made changes to Web.XML of the web server from my research on the web and it looks like the following:

<listener><listener-class>php.java.servlet.ContextLoaderListener</listener-class></listener>
<servlet>
<servlet-name>PhpJavaServlet</servlet-name>
<servlet-class>php.java.servlet.PhpJavaServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>PhpCGIServlet</servlet-name>
<servlet-class>php.java.servlet.fastcgi.FastCGIServlet</servlet-class>
    <init-param><param-name>prefer_system_php_exec</param-name><param-value>On</param-value></init-param>
    <init-param><param-name>php_include_java</param-name><param-value>On</param-value></init-param>
</servlet>
<servlet-mapping><servlet-name>PhpJavaServlet</servlet-name><url-pattern>*.phpjavabridge</url-pattern> </servlet-mapping>
<servlet-mapping><servlet-name>PhpCGIServlet</servlet-name><url-pattern>*.php</url-pattern></servlet-mapping>

Now the Listener entry seem to be preventing the Tomcat7 startup. Below is the data from trace. Has anybody seen or fixed this before? Please share your thoughts.

SEVERE: Exception sending context initialized event to listener instance of class php.java.servlet.ContextLoaderListener
java.lang.NullPointerException
    at java.io.File.<init>(File.java:222)
    at php.java.bridge.http.NPChannelFactory.test(NPChannelFactory.java:61)
    at php.java.bridge.http.FCGIConnectionPool.<init>(FCGIConnectionPool.java:175)
    at php.java.bridge.http.FCGIConnectionPool.<init>(FCGIConnectionPool.java:189)
    at php.java.servlet.ContextLoaderListener.createConnectionPool(ContextLoaderListener.java:541)
    at php.java.servlet.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:185)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1114)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1673)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
25-mrt-2013 16:38:55 org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
25-mrt-2013 16:38:55 org.apache.catalina.core.StandardContext startInternal
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