Simple PHP class that can be used to fetch locations from PHLAPI.

phlapi.php

<?php 

/**
 * 
 * A simple class to retrieve point data from PHLAPI.
 *
 */
class PhlApi {
	
	// Private class members.
	private $host;
	private $port;
	private $data_set;
	private $version;
	private $bbox;
	
	// Class constructor.
	public function __construct($host, $port, $data_set, $version="v1") {
		$this->host = $host;
		$this->port = $port;
		$this->data_set = $data_set;
		$this->version  = $version;
	}
	
	// Gets locations based on bounding box coordinates.
	public function getLocations($lat1, $lon1, $lat2, $lon2) {
		$this->bbox = self::makeBoundingBox($lat1, $lon1, $lat2, $lon2);
		return self::makeApiCall();
	}
	
	// Make HTTP request to PHLAPI.
	private function makeApiCall() {
		
		$url = 'http://'. $this->host . ':' . $this->port . '/' . $this->version .'/' . $this->data_set . '?bbox=' . $this->bbox;
		$ch = curl_init($url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HTTPHEADER, array("Host: $this->host:$this->port"));
		$result = curl_exec($ch);
		$error = curl_errno($ch);
		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		
		if($code != '200') {
			throw new PhlApiException("Invalid response code returned: " . $code);
		}
		elseif($result === false) {
			throw new PhlApiException("An error occured: " . $error);
		}
		else {
			return $result;
		}
		
	}

	// Utility function to construct bounding box
	private function makeBoundingBox($lat1, $lon1, $lat2, $lon2) {
		return $this->bbox = implode(",", array($lat1, $lon1, $lat2, $lon2));
	}
 	
}

/**
 * 
 * Class to wrap exceptions.
 *
 */
class PhlApiException extends Exception { }

try {
	
	// Create a new instance of PhlApi clas.
	$phlapi = new PhlApi("phlapi.com", 5984, "phl_libraries");
	
	// Pass in bounding box coordinates.
	$libraries = $phlapi->getLocations("-75.1733961","39.9438813","-75.1433961","39.9738813");
	
	// Get JSON response from PHLAPI.
	$locations = json_decode($libraries);
	
	// Iterate over result JSON and write out library names.
	foreach($locations->features as $location) {
		echo "Branch name: ". $location->properties->properties->BRANCH_NAM ."\n";
	}	
}

catch (PhlApiException $ex) {
	die($ex->getMessage());
}


?>