<?php

 $options = array

 (

     'hostname' => 'localhost',

     'port'     => '8080',

     'path'=>'solr/help_category',

     'wt'=>'json'

 );

 $client = new SolrClient($options); 

 $entryId=501000;

 $client->deleteById($entryId);

 //$client->deleteByQuery('id:'.$entryId);

 $return=$client->commit();

 var_dump($return);

 ?>