// Reference of all global helper functions available in Klytos CMS. Use when developing plugins, extending the CMS, accessing core services, checking permissions, generating URLs, logging messages, or calling any klytos_* global function from PHP code.
Guide for developing and maintaining Klytos CMS core. Use when modifying core files, adding MCP tools, fixing bugs, extending the core architecture, changing the build engine, modifying the installer, implementing hooks, or working with storage backends. Covers foundational principles (AI-first, privacy by design, security by default), architecture, boot sequence, manager pattern, MCP tool registration, and security checklist.
Complete guide for developing Klytos CMS plugins including structure, entry points, MCP tools, admin pages, hooks, routes, and best practices. Use when creating, modifying, extending Klytos functionality, adding MCP tools, admin pages, hooks, filters, or debugging plugins.
Complete reference of CSS design tokens, component classes, utility classes, and frontend styling in Klytos CMS. Use when building content, plugins, or admin templates that need consistent styling without hardcoding colors or writing custom CSS.
Guide for creating custom page templates, template parts, hook points, reusable blocks, and page template recipes in Klytos CMS. Use when creating new page layout templates, customizing template parts, adding frontend hook points, defining reusable blocks with slots, or building page template recipes combining multiple blocks.
Complete reference of all hooks (actions and filters) available in Klytos CMS for intercepting and extending functionality. Use when hooking into Klytos events, modifying behavior through filters, adding custom behavior at lifecycle points, or understanding the hook system and priorities.
Guide for saving and retrieving plugin options and site configuration in Klytos CMS. Use when a plugin needs to store or read persistent settings, manage site configuration, retrieve options, save persistent key-value data, work with the Options API, Site Config, or Storage API, manage plugin settings, query options by domain, or clean up options during plugin uninstall.
| name | Klytos Helper Functions |
| description | Reference of all global helper functions available in Klytos CMS. Use when developing plugins, extending the CMS, accessing core services, checking permissions, generating URLs, logging messages, or calling any klytos_* global function from PHP code. |
Use this reference whenever you need to call a Klytos core function from a plugin, a custom template, or any PHP code running inside the CMS. All functions are prefixed with klytos_ and are available globally after boot.
These functions are loaded by App::boot() BEFORE plugins, so they are available in every plugin's init.php.
klytos_add_action(string $hook, callable $callback, int $priority = 10): void
Register a callback for an action hook. Lower priority = runs earlier. Default: 10.
klytos_do_action(string $hook, mixed ...$args): void
Fire an action hook, executing all registered callbacks with the provided arguments.
klytos_remove_action(string $hook, callable $callback): bool
Remove a specific callback from an action hook. Returns true if removed.
klytos_has_action(string $hook): bool
Check if any callbacks are registered for an action hook.
klytos_add_filter(string $hook, callable $callback, int $priority = 10): void
Register a callback that receives, modifies, and returns a value.
klytos_apply_filters(string $hook, mixed $value, mixed ...$args): mixed
Pass a value through all registered filter callbacks. Each callback receives the value and returns its modified version.
klytos_remove_filter(string $hook, callable $callback): bool
Remove a specific callback from a filter hook.
klytos_has_filter(string $hook): bool
Check if any callbacks are registered for a filter hook.
klytos_remove_all_actions(string $hook): void
Remove ALL callbacks from an action hook. Use with caution.
klytos_remove_all_filters(string $hook): void
Remove ALL callbacks from a filter hook. Use with caution.
klytos_did_action(string $hook): int
Check how many times an action has been fired in this request.
klytos_get_fired_actions(): array
Get all actions that have been fired. Returns ['hook' => fire_count, ...].
klytos_get_registered_hooks(): array
Get all registered hooks and callback counts. Returns ['actions' => [...], 'filters' => [...]].
// Register an action
klytos_add_action('page.after_save', function (array $page, string $action): void {
klytos_log('info', "Page {$page['slug']} was {$action}d");
});
// Register a filter
klytos_add_filter('page.content', function (string $html): string {
return '<div class="wrapper">' . $html . '</div>';
});
IMPORTANT: ALWAYS use the global
klytos_*functions. NEVER useHooks::class methods directly. TheHooksclass is an internal engine — all code must use theklytos_*wrappers.
klytos_app(): App
Get the App singleton instance. Provides access to all managers and services.
klytos_storage(): StorageInterface
Get the storage layer (FileStorage or DatabaseStorage). Use this for all data operations.
klytos_auth(): Auth
Get the authentication manager. Provides session management, CSRF, bearer tokens, OAuth.
klytos_config(string $key, mixed $default = null): mixed
Read a configuration value using dot-notation. Examples:
klytos_config('site_name') -> 'My Site'klytos_config('admin_language', 'en') -> 'es'klytos_config('social.twitter') -> '@handle'klytos_set_config(string $key, mixed $value): void
Write a configuration value. Top-level keys only (no dot-notation for writing). Use sparingly — most plugin settings should use klytos_set_option() instead.
klytos_version(): string
Get the current Klytos version. Returns semantic version string (e.g. '0.11.0').
klytos_url(string $path = ''): string
Generate a full URL relative to the Klytos site root.
klytos_admin_url(string $path = ''): string
Generate a full admin URL.
klytos_plugin_url(string $pluginId, string $path = ''): string
Get the public URL for a plugin's assets directory.
klytos_plugin_path(string $pluginId, string $path = ''): string
Get the absolute filesystem path for a plugin's directory.
klytos_is_admin(): bool // True if in admin panel context
klytos_is_mcp(): bool // True if MCP API request
klytos_is_cli(): bool // True if command line
if (klytos_is_mcp()) {
// MCP-specific logic (return JSON)
} elseif (klytos_is_admin()) {
// Admin panel logic (render HTML)
}
klytos_current_user(): ?array
Get the currently authenticated user. Returns null if not logged in.
Returns: ['id' => string, 'username' => string, 'role' => string, 'email' => string]
klytos_has_permission(string $permission): bool
Check if the current user has a specific permission. Owner role has ALL permissions.
| Permission | Roles Allowed |
|---|---|
pages.view | owner, admin, editor, viewer |
pages.create | owner, admin, editor |
pages.edit | owner, admin, editor |
pages.delete | owner, admin |
theme.manage | owner, admin |
menu.manage | owner, admin |
blocks.manage | owner, admin |
templates.manage | owner, admin |
templates.approve | owner |
build.run | owner, admin |
assets.manage | owner, admin, editor |
tasks.create | owner, admin, editor |
tasks.manage | owner, admin |
users.manage | owner |
mcp.manage | owner, admin |
site.configure | owner, admin |
plugins.manage | owner |
analytics.view | owner, admin, editor |
forms.manage | owner, admin |
webhooks.manage | owner, admin |
updates.manage | owner |
klytos_add_filter('auth.capabilities', function (array $capabilities): array {
$capabilities['my_plugin.manage'] = ['owner', 'admin'];
$capabilities['my_plugin.view'] = ['owner', 'admin', 'editor'];
return $capabilities;
});
klytos_get_option(string $key, mixed $default = null): mixed
klytos_set_option(string $key, mixed $value): void
klytos_delete_option(string $key): bool
klytos_option_exists(string $key): bool
klytos_register_option(string $key, bool|string $sensitive = false, array $meta = []): void
klytos_get_option_sensitivity(string $key): bool|string|null
Declare data sensitivity so Klytos encrypts options appropriately:
true — Always encrypted (API keys, tokens, secrets)'user_data' — Encrypted from medium level (emails, IPs, GDPR data)false — Only encrypted at professional level (default)Convention: 'plugin_id.setting_name' (e.g. 'my-gallery.columns').
klytos_get_meta(string $collection, string $entityId, string $key): mixed
klytos_set_meta(string $collection, string $entityId, string $key, mixed $value): void
klytos_delete_meta(string $collection, string $entityId, string $key): bool
klytos_get_all_meta(string $collection, string $entityId): array
klytos_timezone(): \DateTimeZone // Site's timezone object (cached)
klytos_timezone_string(): string // IANA timezone string (e.g. 'Europe/Madrid')
klytos_timezone_offset(): int // UTC offset in seconds (DST-aware)
klytos_timezone_reset_cache(): void // Clear timezone cache after config change
klytos_now_utc(): string // Current UTC time as ISO 8601
klytos_now_local(): string // Current local time as ISO 8601
klytos_time(): int // Current Unix timestamp (filterable via 'time.now')
klytos_gmdate( string $fmt, ?int $ts ): string // Format in UTC
klytos_date( string $fmt, ?int $ts ): string // Format in local timezone
klytos_format_datetime( string $iso, string $fmt ): string // Format ISO string for display
klytos_utc_to_local( string $utc, string $fmt ): string // UTC to local conversion
klytos_local_to_utc( string $local, string $fmt ): string // Local to UTC conversion
klytos_datetime_to_timestamp( string $dt ): int // ISO string to Unix timestamp
klytos_timestamp_to_datetime( int $ts ): string // Unix timestamp to ISO 8601 UTC
klytos_timezone_list(): array // Grouped IANA timezones for UI
Rule: store in UTC (klytos_now_utc()), display in local (klytos_format_datetime()). Never use bare date(). See klytos-time skill for full details.
Source: core/helpers-time.php, core/timezone-cache.php
klytos_schedule_single_action(int $timestamp, string $hook, array $args = [], string $group = ''): string
klytos_schedule_recurring_action(int $timestamp, int $intervalSeconds, string $hook, array $args = [], string $group = ''): string
klytos_cancel_scheduled_action(string $actionId): bool
klytos_unschedule_all_actions(string $hook, array $args = [], string $group = ''): int
klytos_next_scheduled_action(string $hook, array $args = [], string $group = ''): ?int
klytos_is_scheduled_action(string $hook, array $args = [], string $group = ''): bool
klytos_register_route( string $pattern, array $config ): void
Register a dynamic route from a plugin. Config requires callback (callable) and type ('page', 'api', 'webhook'). Optional: method (default 'GET'), template, title, auth (false|'frontend'|'admin'), capability. See core/route-manager.php.
klytos_register_admin_page( string $pluginId, array $page ): void
Register a plugin admin page with sidebar entry. The $page array requires id (maps to plugins/{pluginId}/admin/{id}.php) and title. Optional: icon, position (85-89), capability, children (sub-pages). Routes through admin/plugin-page.php.
klytos_register_translations(string $pluginId, string $langDir): void
__(string $key, array $replacements = []): string
klytos_log(string $level, string $message, array $context = [], string $source = 'core'): void
PSR-3 levels: emergency, alert, critical, error, warning, notice, info, debug.
Requires Developer Mode active. For plugin sources, plugin must have logging enabled.
Logs written to data/logs-{random}/debug-YYYY-MM-DD.log with daily rotation and 5MB file-size splitting.
Level-specific helpers (all accept $message, $context = [], $source = 'core'):
klytos_log_emergency(), klytos_log_alert(), klytos_log_critical(),
klytos_log_error(), klytos_log_warning(), klytos_log_notice(),
klytos_log_info(), klytos_log_debug()
$app->getLogger()->writeAlways(string $level, string $message, array $context = [], string $source = 'core'): void
Bypasses Developer Mode and per-plugin checks. Used by the shutdown handler for fatal errors that MUST always be logged. Not intended for normal application logging — use klytos_log_*() for that.
Registered in admin/bootstrap.php via register_shutdown_function. Catches PHP fatal errors (E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR) that occur after boot and logs them unconditionally to both PHP error_log() and Klytos logs via Logger::writeAlways().
Helpers::sanitizeSlug(string $slug): string // "Cafe & Musica" -> "cafe-musica"
Helpers::transliterate(string $text): string // e->e, u->u, n->n
Helpers::smartTruncate(string $text, int $max = 160): string
Helpers::now(): string // ISO 8601 timestamp
Helpers::randomHex(int $bytes = 32): string // Secure random hex
Helpers::generateBearerToken(): string // 64-char hex token
Helpers::hashToken(string $token): string // SHA-256 hash
klytos_add_shortcode(string $tag, callable $callback, string $description = ''): void
Register a shortcode [tag]. Callback: (array $attrs, string $content, string $tag) → string.
klytos_do_shortcode(string $content): string
Process all registered shortcodes in a string.
klytos_shortcode_exists(string $tag): bool
Check if a shortcode tag is registered.
klytos_set_transient(string $key, mixed $value, int $ttl = 3600): bool
klytos_get_transient(string $key): mixed // returns false on miss
klytos_delete_transient(string $key): bool
Temporary data storage with auto-expiration. Wraps CacheManager with transient: prefix.
klytos_http(): \Klytos\Core\HttpClient
klytos_http_get(string $url, array $args = []): array
klytos_http_post(string $url, mixed $body = null, array $args = []): array
Returns: ['status' => int, 'headers' => array, 'body' => string, 'error' => ?string].
klytos_register_dashboard_widget(string $id, string $title, callable $callback, int $position = 50, ?string $capability = null): void
klytos_unregister_dashboard_widget(string $id): void
klytos_get_dashboard_widgets(): array
Register widgets in the admin.dashboard.init action.
klytos_is_maintenance_mode(): bool
$storage = klytos_storage();
$storage->read(string $collection, string $id): array
$storage->write(string $collection, string $id, array $data): void
$storage->delete(string $collection, string $id): bool
$storage->exists(string $collection, string $id): bool
$storage->list(string $collection, array $filters = []): array
$storage->count(string $collection, array $filters = []): int
$storage->search(string $collection, string $query, array $fields = []): array
$storage->transaction(callable $fn): mixed
core/helpers-global.phpcore/helpers.phpcore/app.phpcore/storage-interface.php