First release of how I changed the challenge.

assets/classes/geocode.php

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+<?php
+/****************************************************
+*	Geocode Class - Collection of geocoding Utilities
+*
+* 	Created By: Rick Hays
+* 		  Date: 2011-09-12
+*
+*	 Revisions:
+*	 2011-09-12  RLH  Added "straight_line_distance"
+* 	 2011-09-12  RLH  Added "getLatLong"
+* 	 2019-09-28  RLH  Added "getDistance"
+*
+*****************************************************/
+require_once 'key.php';
+
+class geocode
+{
+	/*******************************************************************************************************************
+	 * straight_line_distance - Returns Straight Line distance between two sets of (LAT/LONGS)
+	 *
+	 * @param float  $lat1 - Latitude of Location #1
+	 * @param float  $lon1 - Longitude of Location #1
+	 * @param float  $lat2 - Latitude of Location #2
+	 * @param float  $lon2 - Longitude of Location #2
+	 * @param string $unit - Unit of measure [DEFAULT = statute miles] ('K'=kilometers, 'N'=nautical miles)
+	 *
+	 * @return float - returns the distance in the desired unit of measure.
+	 */
+	public function straight_line_distance($lat1, $lon1, $lat2, $lon2, $unit='')
+	{
+		$theta = $lon1 - $lon2;
+		$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
+		$dist = acos($dist);
+		$dist = rad2deg($dist);
+		$miles = $dist * 60 * 1.1515;
+		$unit = strtoupper($unit);
+		if ($unit == "K") { return ($miles * 1.609344); }       // Return in Kilometers
+		else if ($unit == "N") { return ($miles * 0.8684); }    // Return in Nautical Miles
+		else { return $miles; }                                 // Return in Miles
+	}
+
+	/*******************************************************************************************************************
+	 * getLatLong - Converts a string with a street address into Lat/Long coordinates using a Google call.
+	 *
+	 * @param string $address - Text address to convert.
+	 *
+	 * @return array
+	 */
+	public function getLatLong($address)
+	{
+		if (!is_string($address))die("All Addresses must be passed as a string");
+		$_url = sprintf('https://maps.googleapis.com/maps/api/geocode/json?address=%s&'.API_KEY,rawurlencode($address));
+		if($_result = file_get_contents($_url))
+		{
+			$decode = json_decode($_result,true);
+			$_coords['status'] = $decode['status'];
+			$_coords['lat']    = $decode['results'][0]['geometry']['location']['lat'];
+			$_coords['lon']    = $decode['results'][0]['geometry']['location']['lng'];
+			return $_coords;
+		}else die('Nothing was returned');
+
+	}
+
+	/*******************************************************************************************************************
+	 * @param        $origin
+	 * @param        $destination
+	 * @param string $mode  (driving, walking, bicycling)
+	 * @param string $units (metric, imperial)
+	 *
+	 * @return array
+	 * @example - https://maps.googleapis.com/maps/api/distancematrix/json?'.$this->api_key.'&origins='.rawurlencode($origin).'&destinations='.rawurlencode($destination).'&mode=driving&units=imperial&sensor=false
+	 *
+	 */
+	public function getDistance($origin, $destination, $mode='driving', $unit='imperial')
+	{
+		// Set defaults to test for
+		$modes = array('driving', 'walking', 'bicycling');
+		$units = array('metric', 'imperial');
+
+		// Test that addresses are present
+		if (!is_string($origin) || !is_string($destination))die("All Addresses must be passed as a string");
+
+		// Test that Mode is present and of correct value
+		$mode = strtolower($mode);
+		if (!in_array($mode, $modes))die("Mode not correct");
+
+		// Test that Unit is present and of correct value
+		$unit = strtolower($unit);
+		if (!in_array($unit, $units))die("Unit not correct");
+
+		// Prep string for send ie(remove spaces and other objects)
+		$_origin      = rawurlencode($origin);
+		$_destination = rawurlencode($destination);
+		$_mode        = rawurlencode($mode);
+		$_unit        = rawurlencode($unit);
+
+		$_url = sprintf('https://maps.googleapis.com/maps/api/distancematrix/json?%s&origins=%s&destinations=%s&mode=%s&units=%s&sensor=false',API_KEY, $_origin, $_destination, $_mode, $_unit);
+		if($_result = file_get_contents($_url))
+		{
+			$decode = json_decode($_result,true);
+			$_dist['status']   = $decode['status'];
+			$_dist['distance'] = $decode['rows'][0]['elements'][0]['distance']['text'];
+			$_dist['duration'] = $decode['rows'][0]['elements'][0]['duration']['text'];
+			return $_dist;
+		}else die('Nothing was returned');
+	}
+
+}   // End Class GEOCODE
+
+
+
+

assets/data/pharmacies.csv

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+"name","address","city","state","zip","latitude","longitude"
+"WALGREENS","3696 SW TOPEKA BLVD","TOPEKA","KS",66611,39.00142300,-95.68695000
+"KMART PHARMACY   ","1740 SW WANAMAKER ROAD","TOPEKA","KS",66604,39.03504000,-95.75870000
+"CONTINENTAL PHARMACY LLC","821 SW 6TH AVE","TOPEKA","KS",66603,39.05433000,-95.68453000
+"STORMONT-VAIL RETAIL PHARMACY","2252 SW 10TH AVE.","TOPEKA","KS",66604,39.05167000,-95.70534000
+"DILLON PHARMACY","2010 SE 29TH ST","TOPEKA","KS",66605,39.01638400,-95.65065000
+"WAL-MART PHARMACY       ","1501 S.W. WANAMAKER ROAD","TOPEKA","KS",66604,39.03955000,-95.76459000
+"KING PHARMACY","4033 SW 10TH AVE","TOPEKA","KS",66604,39.05121000,-95.72700000
+"HY-VEE PHARMACY      ","12122 STATE LINE RD","LEAWOOD","KS",66209,38.90775300,-94.60801000
+"JAYHAWK PHARMACY AND PATIENT SUPPLY","2860 SW MISSION WOODS DR","TOPEKA","KS",66614,39.01505300,-95.77866000
+"PRICE CHOPPER PHARMACY","3700 W 95TH ST","LEAWOOD","KS",66206,38.95792000,-94.62881500
+"AUBURN PHARMACY","13351 MISSION RD","LEAWOOD","KS",66209,38.88534500,-94.62800000
+"CVS PHARMACY","5001 WEST 135 ST","LEAWOOD","KS",66224,38.88323000,-94.64518000
+"SAMS PHARMACY       ","1401 SW WANAMAKER ROAD","TOPEKA","KS",66604,39.04160300,-95.76462600
+"CVS PHARMACY","2835 SW WANAMAKER RD","TOPEKA","KS",66614,39.01550300,-95.76434000
+"HY-VEE PHARMACY      ","2951 SW WANAMAKER RD","TOPEKA","KS",66614,39.01215700,-95.76394000
+"TALLGRASS PHARMACY","601 SW CORPORATE VIEW","TOPEKA","KS",66615,39.05716000,-95.76692000
+"HUNTERS RIDGE PHARMACY","3405 NW HUNTERS RIDGE TER STE 200","TOPEKA","KS",66618,39.12984500,-95.71265400
+"ASSURED PHARMACY  ","11100 ASH ST STE 200","LEAWOOD","KS",66211,38.92663200,-94.64744000
+"WALGREENS","4701 TOWN CENTER DR","LEAWOOD","KS",66211,38.91619000,-94.64036600
+"PRICE CHOPPER PHARMACY","1100 SOUTH 7 HWY","BLUE SPRINGS","MO",64015,39.02931000,-94.27175000
+"CVS PHARMACY","1901 WEST KANSAS STREET","LIBERTY","MO",64068,39.24385000,-94.44961000
+"MARRS PHARMACY","205 RD MIZE ROAD","BLUE SPRINGS","MO",64014,39.02353000,-94.26060500
+"WAL-MART PHARMACY       ","600 NE CORONADO DRIVE","BLUE SPRINGS","MO",64014,39.02419300,-94.25503000
+"WAL-MART PHARMACY       ","10300 E HWY 350","RAYTOWN","MO",64133,38.98376500,-94.45930500
+"HY-VEE PHARMACY      ","9400 E. 350 HIGHWAY","RAYTOWN","MO",64133,38.99300000,-94.47083000
+"HY-VEE PHARMACY      ","625 W 40 HWY","BLUE SPRINGS","MO",64014,39.01070400,-94.27108000
+"HY-VEE PHARMACY      ","109 NORTH BLUE JAY DRIVE","LIBERTY","MO",64068,39.24575800,-94.44702000
+"WALGREENS     ","1701 NW HIGHWAY 7","BLUE SPRINGS","MO",64015,39.03754800,-94.27153000
+"WALGREENS     ","9300 E GREGORY BLVD","RAYTOWN","MO",64133,38.99534200,-94.47340000
+"WALGREENS     ","1191 W KANSAS AVE","LIBERTY","MO",64068,39.24387000,-94.44186400

assets/js/system.js

@@ -0,0 +1,85 @@
+function btnFind()
+{
+	// Reset Rows
+	$("#alertBox").hide();
+	$(".alert").html("");
+	$('.alert').removeClass('alert-warning').removeClass('alert-danger').addClass('alert-warning');
+	$("#spinnerBox").hide();
+	$("#txtOutput").hide();
+
+	// Set Vars
+	let txtAddress = $("#txtAddress").val() + "";
+	// Quick test to make sure address was entered.
+	if (txtAddress === "")
+	{
+		$(".alert").html("You have to enter an address first.");
+		$("#alertBox").show();
+		return;
+	}
+
+	// Show Spinner
+	$("#spinnerBox").show();
+
+	// API - Call geocode API
+	// K       = (Required) Key, allows access to API
+	// C       = (Required) Command,
+	//           LL   - Will return the Lat/Lon of a given address.
+	//           DIST - Will return the distance information.
+	// T       = (Optional) Test, Test Mode = 1 will only pull one record from the DB
+	// ADDRESS = Address you want to return the Lat/Lon or Distance from.
+	$.ajax(
+	{
+		url : 'https://rhays.us/Examples/RX_API_Two/RX2.php',
+		type : 'GET',
+		dataType: 'json',
+		data :
+		{
+			'K'       : 'RLH4321',
+			'C'       : 'DIST',
+			'T'       : '1',
+			'address' : txtAddress,
+		},
+		success : function(data)
+		{
+			switch(data.status.toUpperCase())
+			{
+				case 'OK':
+					          sOutput = '<p>The Pharmacy closest to the address location you entered is: </p>';
+					sOutput = sOutput + 'Pharmacy: <b>' + data.pharmacy + '</b><br/>';
+					sOutput = sOutput + 'Address: <b>'  + data.address  + '</b><br/>';
+					sOutput = sOutput + 'City: <b>'     + data.city     + '</b><br/>';
+					sOutput = sOutput + 'State: <b>'    + data.state    + '</b><br/>';
+					sOutput = sOutput + 'Zip: <b>'      + data.zip      + '</b><br/><br/>';
+					sOutput = sOutput + '<p>Approx. Drive time and distance:</p>';
+					sOutput = sOutput + 'Distance: <b>' + data.distance + '</b><br/>';
+					sOutput = sOutput + 'Duration: <b>' + data.duration + '</b><br/>';
+
+					$("#txtOutput").html(sOutput);
+					$("#spinnerBox").hide();
+					$("#txtOutput").show();
+					break;
+				case 'ERROR':
+					$("#spinnerBox").hide();
+					$('.alert').removeClass('alert-warning').removeClass('alert-danger').addClass('alert-danger');
+					$(".alert").html(JSON.stringify('Error code: ' + data.code + ' - ' + data.description));
+					$("#alertBox").show();
+					break;
+			}
+		},
+		error : function(request,error)
+		{
+			$("#spinnerBox").hide();
+			$('.alert').removeClass('alert-warning').removeClass('alert-danger').addClass('alert-danger');
+			$(".alert").html('SYSTEM.JS<br/> ' + JSON.stringify(request));
+			$("#alertBox").show();
+			return;
+		},
+		// TODO: Hook to put in status codes
+		//		statusCode:
+		//		{
+		//			404: function() {
+		//				alert( "page not found" );
+		//			}
+		//		},
+	});
+}