遍历CSV并使用每个结果解析JSON查询

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.