Looping through CSV and parsing a JSON query using each result - php

Question

So despite hours of fiddling I cannot understand why my JSON query only returns a result for the last line in the CSV/TXT files I am trying to parse.
Here is the code:
//Enter API Key Here
$api_key = 'AIzaSyB9Dq3w1HCxkS5qyELI_pZuTmdK8itOBHo';
$origin = 'RG12 1AA';
$output_type = 'json'; //xml or json
$csv_location = 'http://www.naturedock.co.uk/postcodes.csv';
//Do not edit
$base_url = 'https://maps.googleapis.com/maps/api/directions/';
$origin_url = '?origin=';
$destination_url = '&destination=';
$end_url = '&sensor=false&key=';
$page = join("",file("$csv_location"));
$kw = explode("\n", $page);
for($i=0;$i<count($kw);$i++){
$destination = $kw[$i];
echo $destination;
$raw_url = $base_url . $output_type . $origin_url . $origin . $destination_url . $destination . $end_url . $api_key;
$request_url = str_replace(' ', '', $raw_url);
$getJson = file_get_contents($request_url);
$routes = json_decode($getJson);
$result = $routes->routes[0]->legs[0]->distance->value;
echo $result . '<br>';
}
The result I get looks like this:
Distance by Post Code Generator v0.1 by Phil Hughes
RG12 0GA
RG12 0GB
RG12 0GC
RG12 0GD4066
Where the '4066' is the correct variable for RG12 0GD postcode but none of the others return results as you can see.
Please help.

Answer 1

Your
join("",file("$csv_location"));
concatenated all lines feom the file to a single line without separator. The following explode() sees no newlines any more. So you are working on one line only. count($kw) always evaluates to 1 and your loop runs only one time.