Читать книгу Professional WordPress Plugin Development - Brad Williams - Страница 95

Some of the function calls used here need to be hooked into WordPress actions such as admin_init. Let's recapitulate all the steps covered bit by bit into a full‐fledged plugin.

<?php /* Plugin Name: Settings API example Plugin URI: https://example.com/ Description: A complete and practical example of the WordPress Settings API Author: WROX Author URI: http://wrox.com */ // Add a menu for our option page add_action( 'admin_menu', 'pdev_plugin_add_settings_menu' ); function pdev_plugin_add_settings_menu() { add_options_page( 'PDEV Plugin Settings', 'PDEV Settings', 'manage_options', 'pdev_plugin', 'pdev_plugin_option_page' ); } // Create the option page function pdev_plugin_option_page() { ?> <div class="wrap"> <h2>My plugin</h2> <form action="options.php" method="post"> <?php settings_fields( 'pdev_plugin_options' ); do_settings_sections( 'pdev_plugin' ); submit_button( 'Save Changes', 'primary' ); ?> </form> </div> <?php } // Register and define the settings add_action( 'admin_init', 'pdev_plugin_admin_init' ); function pdev_plugin_admin_init(){ $args = array( 'type' => 'string', 'sanitize_callback' => 'pdev_plugin_validate_options', 'default' => NULL ); // Register our settings register_setting( 'pdev_plugin_options', 'pdev_plugin_options', $args ); // Add a settings section add_settings_section( 'pdev_plugin_main', 'PDEV Plugin Settings', 'pdev_plugin_section_text', 'pdev_plugin' ); // Create our settings field for name add_settings_field( 'pdev_plugin_name', 'Your Name', 'pdev_plugin_setting_name', 'pdev_plugin', 'pdev_plugin_main' ); } // Draw the section header function pdev_plugin_section_text() { echo '<p>Enter your settings here.</p>'; } // Display and fill the Name form field function pdev_plugin_setting_name() { // get option 'text_string' value from the database $options = get_option( 'pdev_plugin_options' ); $name = $options['name']; // echo the field echo "<input id='name' name='pdev_plugin_options[name]' type='text' value='" . esc_attr( $name ) . "'/>"; } // Validate user input (we want text and spaces only) function pdev_plugin_validate_options( $input ) { $valid = array(); $valid['name'] = preg_replace( '/[^a-zA-Z\s]/', '', $input['name'] ); return $valid; } ?>

FIGURE 3‐4: Plugin management page

Activate this plugin and head to Settings ➪ PDEV Settings. You'll see a similar interface to the one shown in Figure 3‐4.