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From Paul Elschot <>
Subject Re: Call Lucene default command line Search from PHP script
Date Fri, 21 Mar 2008 23:32:32 GMT

This is a PHP problem, not a Lucene one, so you might get better
response at a PHP mailing list.

The easy way around your problem is probably by invoking a shell
script from php that exports the class path as you indicated,
so that java can see the correct classes.

Having said that, you'll probably want to use the PHP/Java extension
to avoid initializing a JVM for each call to lucene.  Try this:

This was one of the results:

Paul Elschot

Op Friday 21 March 2008 21:24:37 schreef milu07:
> Hello,
> My machine is Ubuntu 7.10. I am working with Apache Lucene. I have
> done with indexer and tried with command line Searcher (the default
> command line included in Lucene package:
> When I use this at
> command line:
> java Searcher -query algorithm
> it works and returns a list of results to me. Here 'algorithm' is the
> keyword to search.
> However, I want to have a web search interface written in PHP, I use
> PHP exec() to call this Searcher from my PHP script:
> exec("java Searcher -query algorithm ", $arr, $retVal);
> [I also tried: exec("java Searcher -query 'algorithm' ", $arr,
> $retVal)]
> It does not work. I print the value of $retVal, it is 1.
> I come back and try: exec("java Searcher -query algorithm 2>&1 ",
> $arr, $retVal);
> I receive:
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/apache/lucene/analysis/Analyzer
> and $retVal is 1
> In the command line of Lucene, it imports many
> libraries, is this the problem?
> import org.apache.lucene.analysis.Analyzer;
> import org.apache.lucene.analysis.standard.StandardAnalyz er;
> ....
> I guess this is the problem of path. However, I do not know how to
> fix it because it works in command line ($CLASSPATH points to the
> .jar file of Lucene library). May be PHP does not know $CLASSPATH.
> So, I add Lucene lib to $PATH:
> export PATH=$PATH:/usr/lib/lucene-core-2.3.1.jar:/usr/lib
> However, I get the same error message when I try: exec("java Searcher
> -query algorithm 2>&1 ", $arr, $retVal);
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/apache/lucene/analysis/Analyzer
> Could you please help?
> Thank you,

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