README

A declarative, lightweight system for managing WordPress admin notices with automatic GET parameter handling, conditional display, and dismissible notices.

Features

• Declarative API: Register all your notices in one place with a clean configuration array
• Automatic Triggers: Notices appear based on GET parameters (e.g., ?updated=1)
• Dynamic Messages: Support for callbacks with data interpolation
• Conditional Display: Show notices based on conditions (e.g., missing API keys)
• Dismissible Notices: Built-in AJAX dismissal with per-user persistence
• Page Targeting: Limit notices to specific admin pages with wildcard support
• Smart Type Detection: Automatically infers notice type from key naming
• Capability Checks: Restrict notices based on user permissions

Installation

Install via Composer:

composer require arraypress/wp-register-notices

Basic Usage

use function ArrayPress\AdminNotices\register_admin_notices;

// Register your notices during plugin initialization
register_admin_notices( 'myplugin', [
    // Simple success messages
    'added'   => __( 'Item added successfully.', 'myplugin' ),
    'updated' => __( 'Item updated successfully.', 'myplugin' ),
    'deleted' => __( 'Item deleted successfully.', 'myplugin' ),
] );

// Trigger by redirecting with the parameter
wp_redirect( admin_url( 'admin.php?page=myplugin&updated=1' ) );

Advanced Examples

Dynamic Messages with Data

register_admin_notices( 'myplugin', [
    'bulk_deleted' => [
        'message' => function( $args ) {
            $count = absint( $args['count'] ?? 0 );
            return sprintf(
                _n( '%d item deleted.', '%d items deleted.', $count, 'myplugin' ),
                $count
            );
        },
        'type' => 'success',
        'data' => ['count']  // Collect these GET parameters
    ]
] );

// Trigger: ?bulk_deleted=1&count=5
// Shows: "5 items deleted."

Persistent Conditional Notices

register_admin_notices( 'myplugin', [
    'api_key_missing' => [
        'condition' => function() {
            return empty( get_option( 'myplugin_api_key' ) );
        },
        'message' => function() {
            $url = admin_url( 'admin.php?page=myplugin-settings' );
            return sprintf( 
                __( 'API key required. <a href="%s">Configure settings</a>.', 'myplugin' ),
                esc_url( $url )
            );
        },
        'type'        => 'warning',
        'persistent'  => true,        // Shows on every page load
        'dismissible' => false         // Can't be dismissed
    ]
] );

Page-Specific Notices

register_admin_notices( 'myplugin', [
    'settings_saved' => __( 'Settings saved successfully.', 'myplugin' ),
    'license_activated' => __( 'License activated.', 'myplugin' ),
], [
    'pages' => ['myplugin-settings', 'myplugin-license'],  // Only these pages
    'capability' => 'manage_options'                        // Admin only
] );

Error Handling

register_admin_notices( 'myplugin', [
    'error' => [
        'message' => function( $args ) {
            return esc_html( $args['message'] ?? __( 'An error occurred.', 'myplugin' ) );
        },
        'type' => 'error',
        'data' => ['message']
    ]
] );

// Trigger: ?error=1&message=Invalid+email+address
// Shows: "Invalid email address"

Working with IDs

register_admin_notices( 'myplugin', [
    'item_updated' => [
        'message' => function( $args ) {
            if ( ! empty( $args['id'] ) ) {
                return sprintf( __( 'Item #%d updated.', 'myplugin' ), $args['id'] );
            }
            return __( 'Item updated.', 'myplugin' );
        },
        'data' => ['id']
    ]
] );

// Trigger: ?item_updated=1&id=123
// Shows: "Item #123 updated."

Configuration Options

Notice Configuration

Global Options

register_admin_notices( 'myplugin', $notices, [
    'pages'       => ['myplugin', 'myplugin-*'],  // Wildcard support
    'capability'  => 'manage_options',
    'dismissible' => true                          // Default for all notices
] );

Type Detection

The system automatically infers notice types from key names:

register_admin_notices( 'myplugin', [
    'item_updated'        => 'Updated!',    // success (default)
    'item_deleted_error'  => 'Failed!',     // error (suffix)
    'warning_low_stock'   => 'Low stock',   // warning (prefix)
    'info_new_feature'    => 'New feature'  // info (prefix)
] );

Real-World Example

// In your plugin's main file or admin initialization
add_action( 'admin_init', function() {
    register_admin_notices( 'woocommerce_extras', [
        // Simple CRUD notifications
        'product_added'   => __( 'Product added successfully.', 'wc-extras' ),
        'product_updated' => __( 'Product updated successfully.', 'wc-extras' ),
        'product_deleted' => __( 'Product deleted successfully.', 'wc-extras' ),
        
        // Bulk operations with counts
        'bulk_updated' => [
            'message' => function( $args ) {
                $count = absint( $args['count'] ?? 0 );
                return sprintf( 
                    _n( 
                        '%d product updated.', 
                        '%d products updated.', 
                        $count, 
                        'wc-extras' 
                    ), 
                    $count 
                );
            },
            'data' => ['count']
        ],
        
        // Persistent warnings
        'shipping_not_configured' => [
            'condition' => function() {
                $zones = WC_Shipping_Zones::get_zones();
                return empty( $zones );
            },
            'message' => __( 'No shipping zones configured. Products cannot be shipped.', 'wc-extras' ),
            'type' => 'warning',
            'persistent' => true
        ],
        
        // Error handling
        'import_failed' => [
            'message' => function( $args ) {
                $error = $args['error'] ?? __( 'Unknown error', 'wc-extras' );
                $line = $args['line'] ?? 0;
                
                if ( $line > 0 ) {
                    return sprintf( 
                        __( 'Import failed at line %d: %s', 'wc-extras' ), 
                        $line, 
                        esc_html( $error ) 
                    );
                }
                
                return sprintf( __( 'Import failed: %s', 'wc-extras' ), esc_html( $error ) );
            },
            'type' => 'error',
            'data' => ['error', 'line']
        ]
    ], [
        'pages' => ['woocommerce', 'edit-product', 'product'],
        'capability' => 'manage_woocommerce'
    ] );
} );

// In your form handler
function handle_product_save() {
    $product_id = save_product( $_POST );
    
    if ( is_wp_error( $product_id ) ) {
        $url = add_query_arg( [
            'import_failed' => 1,
            'error' => $product_id->get_error_message()
        ], admin_url( 'edit.php?post_type=product' ) );
    } else {
        $url = add_query_arg( [
            'product_updated' => 1,
            'id' => $product_id
        ], admin_url( 'edit.php?post_type=product' ) );
    }
    
    wp_redirect( $url );
    exit;
}

Requirements

• PHP 7.4 or later
• WordPress 5.0 or later

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the GPL-2.0-or-later License.

Credits

Created by David Sherlock at ArrayPress.