Warning: fopen() [function.fopen]: Filename cannot be empty in
caching, fopen, php
Solution
You have a problem with the casing of your variable name. PHP variable names are case sensitive. Change `cacheFile` to `cachefile` (with the small F instead).
Change this:
$cached = fopen($cacheFile, 'w');
To this:
$cached = fopen($cachefile, 'w');
Problem
Im using this tutorial http://papermashup.com/caching-dynamic-php-pages-easily/ for caching a page ``` <?php { $cachefile = $_SERVER['DOCUMENT_ROOT'].'cache.html'; $cachetime = 4 * 60; // Serve from the cache if it is younger than $cachetime if (file_exists($cachefile) && time() - $cachetime < filemtime($cachefile)) { include($cachefile); } else { ob_start(); // Start the output buffer ?> /* Heres where you put your page content */ <?php // Cache the contents to a file $cached = fopen($cacheFile, 'w'); fwrite($cached, ob_get_contents()); fclose($cached); ob_end_flush(); // Send the output to the browser } ?> ``` but i get the following errors ``` Warning: fopen() [function.fopen]: Filename cannot be empty in Warning: fwrite(): supplied argument is not a valid stream resource in Warning: fclose(): supplied argument is not a valid stream resource in ``` The path to the file is right. And if i edit the file my self is included but again i get the errors