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<?php
/**
* A simple set of functions to check our version 1.0 update service
*
* @package WordPress
* @since 2.3
*/
/**
* wp_version_check() - Check WordPress version against the newest version.
*
* The WordPress version, PHP version, and Locale is sent. Checks against the WordPress server at
* api.wordpress.org server. Will only check if PHP has fsockopen enabled and WordPress isn't installing.
*
* @package WordPress
* @since 2.3
* @uses $wp_version Used to check against the newest WordPress version.
*
* @return mixed Returns null if update is unsupported. Returns false if check is too soon.
*/
function wp_version_check() {
if ( !function_exists('fsockopen') || strpos($_SERVER['PHP_SELF'], 'install.php') !== false || defined('WP_INSTALLING') )
return;
global $wp_version;
$php_version = phpversion();
$current = get_option( 'update_core' );
$locale = get_locale();
if (
isset( $current->last_checked ) &&
43200 > ( time() - $current->last_checked ) &&
$current->version_checked == $wp_version
)
return false;
$new_option = '';
$new_option->last_checked = time(); // this gets set whether we get a response or not, so if something is down or misconfigured it won't delay the page load for more than 3 seconds, twice a day
$new_option->version_checked = $wp_version;
$http_request = "GET /core/version-check/1.1/?version=$wp_version&php=$php_version&locale=$locale HTTP/1.0\r\n";
$http_request .= "Host: api.wordpress.org\r\n";
$http_request .= 'Content-Type: application/x-www-form-urlencoded; charset=' . get_option('blog_charset') . "\r\n";
$http_request .= 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n";
$http_request .= "\r\n";
$response = '';
if ( false !== ( $fs = @fsockopen( 'api.wordpress.org', 80, $errno, $errstr, 3 ) ) && is_resource($fs) ) {
fwrite( $fs, $http_request );
while ( !feof( $fs ) )
$response .= fgets( $fs, 1160 ); // One TCP-IP packet
fclose( $fs );
$response = explode("\r\n\r\n", $response, 2);
if ( !preg_match( '|HTTP/.*? 200|', $response[0] ) )
return false;
$body = trim( $response[1] );
$body = str_replace(array("\r\n", "\r"), "\n", $body);
$returns = explode("\n", $body);
$new_option->response = attribute_escape( $returns[0] );
if ( isset( $returns[1] ) )
$new_option->url = clean_url( $returns[1] );
if ( isset( $returns[2] ) )
$new_option->current = attribute_escape( $returns[2] );
}
update_option( 'update_core', $new_option );
}
add_action( 'init', 'wp_version_check' );
?>
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