Simple Solr Interfacing PHP Class

Solr.class.php

<?php
//Solr interfacing class
class Solr
{
	//For the constructor
	public $solr_url;

	public function __construct($url)
	{
 		$this->solr_url = $url;
	}
	//Queries Solr for the given request
	public function getQuery($query = '*')
	{
		$docNames = array();
		$xml = new DOMDocument();
		$xml->load( $this->solr_url . "/select/?q=" . urlencode($query) );
		$docs = $xml->getElementsByTagName('doc');
		foreach($docs as $doc){
			$items = $doc->getElementsByTagName('str');
			foreach($items as $item){
				if($item->getAttribute('name') == 'id'){
					$docNames[] = $item->nodeValue;
					break;
				}
			}
		}
		return $docNames;
	}
	//Adds an item to the Solr index and also "commits" it for indexing
	public function addAndCommitSolrDocument($name,$doc_path)
	{
		$post_data = array();
		//Solr URL on which we have to post data
		$url = $this->solr_url . "/update/extract?literal.id=" . urlencode($name) . "&commit=true";
		//Any other field you might want to catch
		$post_data['name'] = $name;
		//File you want to upload/post
		$post_data['file'] = "@" . $doc_path;
		//Send the request
		return $this->call($url, $post_data);
	}
	//Removes an item from the Solr index
	public function removeFromIndex($name)
	{
		//Build the Solr URL on which we have to post data
		$url = $this->solr_url . "/update?commit=true";
		//Name of file to delete from index (Build the XML)
		$post_data = "<delete><id>" . urlencode($name) . "</id></delete>";
		//Send the request
		return $this->call($url, $post_data, "Content-type:text/xml; charset=utf-8");
	}
	public function call($url, $post_data = null, $header = null){
		// Initialize cURL
		$ch = curl_init();
		// Request header
		if( $header !== null ){
			curl_setopt($ch, CURLOPT_HTTPHEADER, array($header));
		}
		// Set URL on which you want to post the Form and/or data
		curl_setopt($ch, CURLOPT_URL, $url);
		// Data+Files to be posted
		if($post_data !== null)
		{
			curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
		}
		// Pass TRUE or 1 if you want to wait for and catch the response against the request made
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		// For Debug mode; shows up any error encountered during the operation
		curl_setopt($ch, CURLOPT_VERBOSE, 1);
		// Execute the request
		return curl_exec($ch);
	}
}

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