/**
 * Pre-boot php.ini content for legacy PHP builds (currently 5.2).
 *
 * Why pre-create a php.ini before the SAPI starts:
 *
 * - ini_get_all() crashes on legacy PHP WASM (null function pointer in
 *   the Asyncify instrumentation) so we disable it via
 *   `disable_functions`, which PHP only reads during module startup.
 * - OPcache's shared-memory allocator fails in our WASM environment,
 *   so opcache must be disabled before php_module_startup runs.
 *
 * Both settings are processed by php_module_startup before PHP reads
 * any user code, so setting them at runtime via `ini_set()` is too
 * late. The Emscripten preRun hook below writes the ini file before
 * PHP.initializeRuntime invokes __wasm_call_ctors, which in turn
 * invokes wasm_sapi_module_startup → php_module_startup.
 *
 * PHP.initializeRuntime will skip writing its own default php.ini
 * when the file already exists.
 */
export declare const LEGACY_PHP_INI_PATH = "/internal/shared/php.ini";
export declare const LEGACY_PHP_INI_CONTENT: string;
/**
 * Returns an Emscripten preRun callback that writes
 * {@link LEGACY_PHP_INI_CONTENT} to {@link LEGACY_PHP_INI_PATH}.
 */
export declare function createLegacyPhpIniPreRunStep(): (module: {
    FS: {
        mkdirTree: (path: string) => void;
        writeFile: (path: string, content: string) => void;
    };
}) => void;