/**
* Downloads data to a file
*
* @param string $url
* @param string $file
* @return boolean
*/
function w3_download($url, $file)
{
$data = w3_url_get($url);
if ($data !== false) {
return @file_put_contents($file, $data);
}
return false;
}
/**
* Show plugin changes
*/
function in_plugin_update_message()
{
$data = w3_url_get(W3TC_README_URL);
if ($data) {
$matches = null;
if (preg_match('~==\\s*Changelog\\s*==\\s*=\\s*[0-9.]+\\s*=(.*)(=\\s*[0-9.]+\\s*=|$)~Uis', $data, $matches)) {
$changelog = (array) preg_split('~[\\r\\n]+~', trim($matches[1]));
echo '<div style="color: #f00;">Take a minute to update, here\'s why:</div><div style="font-weight: normal;">';
$ul = false;
foreach ($changelog as $index => $line) {
if (preg_match('~^\\s*\\*\\s*~', $line)) {
if (!$ul) {
echo '<ul style="list-style: disc; margin-left: 20px;">';
$ul = true;
}
$line = preg_replace('~^\\s*\\*\\s*~', '', htmlspecialchars($line));
echo '<li style="width: 50%; margin: 0; float: left; ' . ($index % 2 == 0 ? 'clear: left;' : '') . '">' . $line . '</li>';
} else {
if ($ul) {
echo '</ul><div style="clear: left;"></div>';
$ul = false;
}
echo '<p style="margin: 5px 0;">' . htmlspecialchars($line) . '</p>';
}
}
if ($ul) {
echo '</ul><div style="clear: left;"></div>';
}
echo '</div>';
}
}
}
/**
* Downloads URL
*
* @param string $url
* @param string $file
* @return boolean
*/
function download($url, $file)
{
if (($data = w3_url_get($url)) && ($fp = @fopen($file, 'w'))) {
@fputs($fp, $data);
@fclose($fp);
return true;
}
return false;
}
/**
* Precaches external file
*
* @param string $url
* @param string $type
* @return string
*/
function _precache_file($url, $type)
{
$lifetime = $this->_config->get_integer('minify.lifetime');
$file_path = sprintf('%s/minify_%s.%s', W3TC_CACHE_FILE_MINIFY_DIR, md5($url), $type);
$file_exists = file_exists($file_path);
if (file_exists($file_path) && @filemtime($file_path) >= time() - $lifetime) {
return $this->_get_minify_source($file_path, $url);
}
if (is_dir(W3TC_CACHE_FILE_MINIFY_DIR)) {
if ($file_data = w3_url_get($url)) {
if ($fp = @fopen($file_path, 'w')) {
@fputs($fp, $file_data);
@fclose($fp);
return $this->_get_minify_source($file_path, $url);
} else {
$this->log(sprintf('Unable to open file %s for writing', $file_path));
}
} else {
$this->log(sprintf('Unable to download URL: %s', $url));
}
} else {
$this->log(sprintf('The cache directory %s does not exist', W3TC_CACHE_FILE_MINIFY_DIR));
}
return $file_exists ? $this->_get_minify_source($file_path, $url) : false;
}
