PHP cache companion file

gistfile1.aw

<?php

$max_age_seconds = 60*10;
$json_file = dirname(__FILE__).'/'.pathinfo(__FILE__,PATHINFO_FILENAME).'.json';
$data;
if( file_exists( $json_file ) && time() - filemtime( $json_file ) < $max_age_seconds ) {
  $data = file_get_contents( $json_file );
} else {
  // Create $data
  $data = '';
  file_put_contents( $json_file, $data );
}
$json_decoded = json_decode( $data, true );

?>