Questions about how php calls lucene (JAVA) code

Recently, I want to use a web page to display lucene search results. I can use php and javabridge on the internet. However, I can't use the example in javabridge or the class I wrote myself. Apache2.2 + php5 + mysql can now call java's own classes such as java. lang. String, but it cannot be written by yourself... In addition, javabrid has a question about how php calls lucene (JAVA) code.
Recently, I want to use a web page to display Lucene search results. Php and javabridge can be used online. However, I cannot use example in javabridge or my own classes.
Apache2.2 + php5 + mysql
Currently, you can call java classes such as java. lang. String, but you cannot write it yourself... In addition, an example in javabridge is as follows:

PHP code

  
  listFiles();  assert (!java_is_null($files));  foreach($files as $f) {    $doc = new Lucene\document\Document();    $doc->add(new Lucene\document\Field(           "name",            $f->getName(),            Lucene\document\Field::type("Store")->YES,            Lucene\document\Field::type("Index")->UN_TOKENIZED));    $writer->addDocument($doc);  }................................................

But the output is
Warning: Unexpected character in input: '\' (ASCII = 92) state = 0 in C: \ AppServ \ www \ test. php on line 5

Parse error: syntax error, unexpected T_STRING, expecting T_AS or t_paamayim_nekudoim IM or ';' in C: \ AppServ \ www \ test. php on line 5
It seems that php does not use this usage ...?
If java_require ("lucene. jar") is used, then java_require is not supported...
Let's pass by and help you... Thank you.

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Your php version is too low to support namespaces

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Is the environment configured...
Compile a simple php test...
$ Str = new java ("java. lang. String", "hello ");
Echo $ str;
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It seems that I have encountered this problem, but it has not been solved yet.
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Do you need to fill the water upstairs? I have met and haven't solved it yet!
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Write a helloworld package into jar and put it in JavaBridge/WEB-INF/lib/restart jdk

Then in php, $ helloworld = new Java ("helloworld"); try it.

I have no problem.