Rasher's Toolbox - cached_file_get

string cached_file_get_contents(string uri [, int ttl [, string path [, string prefix ]]]) -- Load a file from an URI, keeping a cached copy

Description

This function will copy a file from an URI and save it locally. If a local cache newer than ttl seconds exists, that will be used instead. The file will be stored in path, using the md5sum of the uri and a prefix as the filename.

Example

<?php $contents = cached_file_get_contents('http://rasher.dk/index.php', 1800, 'data/', 'rasherdk-'); ?>

Source


<?php
function cached_file_get_contents($uri, $ttl = 900, $dir = '.', $prefix = '', $debug = false) {
    $file = sprintf("%s/%s%s", $dir, $prefix, md5($uri));
    if (!file_exists($file) || (time() - filemtime($file)) > $ttl) {
        if (file_exists($file) && $debug !== false) printf("Getting %s (TTL:%d, Age:%d<br />\n", $uri, $ttl, time() - filemtime($file));
        elseif ($debug !== false && !file_exists($file)) printf("Getting %s<br />\n", $uri);
        $contents = file_get_contents($uri);
        if ($contents === false) return false;
        file_put_contents($file, $contents);
    }
    return file_get_contents($file);
}
?>