Help needed with caching a json file

[Laser]

I am trying to adapt this code to help cache a json file. If I manually place the file in the cache folder the script runs fine. If I refresh the link the file is deleted and a new file is not downloaded.

 

I am hoping someone can see what I am doing wrong.

 

Thanks

laser

 

(note I tried postig this once sorry if it shows up twice)

 

I also removed my api key from the json url.

<?php

/**
* Request jobs from WU API
*
* Split the request into smaller request chunks (25 results each)
* and then consolidate them into a single array to meet the API
* requirements.
*/
function wu_api_request()
{
    file_put_contents("/cache/KHPN.json", 
file_get_contents('http://api.wunderground.com/api/xxxxxxxxxxx/geolookup/conditions/q/KHPN.json'));
}

/**
* API Request Caching
*
* Use server-side caching to store API request's as JSON at a set
* interval, rather than each pageload.
*
* @arg Argument description and usage info
*/
function json_cached_api_results( $cache_file = NULL, $expires = NULL ) {
global $request_type, $purge_cache, $limit_reached, $request_limit;

if( !$cache_file ) $cache_file = dirname(__FILE__) . '/cache/KHPN.json';
if( !$expires) $expires = time() - 2*30*30;

if( !file_exists($cache_file) ) die("Cache file is missing: 
$cache_file");

// Check that the file is older than the expire time and that it's not 
empty
if ( filectime($cache_file) < $expires || 
file_get_contents($cache_file)  == '' || $purge_cache && 
intval($_SESSION['views']) <= $request_limit ) {

  // File is too old, refresh cache
  $api_results = wu_api_request();
  $json_results = json_encode($api_results);

  // Remove cache file on error to avoid writing wrong xml
  if ( $api_results && $json_results )
   file_put_contents($cache_file, $json_results);
  else
   unlink($cache_file);
} else {
  // Check for the number of purge cache requests to avoid abuse
  if( intval($_SESSION['views']) >= $request_limit )
   $limit_reached = " <span class='error'>Request limit 
reached ($request_limit). Please try purging the cache later.</span>";
  // Fetch cache
  $json_results = file_get_contents($cache_file);
  $request_type = 'JSON';
}

return json_decode($json_results);
}

json_cached_api_results();




?>

[Laser]

Problem solved .

Please disregard