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Add metabox to Link Manager
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| <?php | |
| /* | |
| * Add metabox to Link Manager | |
| * Description: Add attributes to each link, each link's attributes are saved serialized as an option. | |
| * Author: Tatiane Pires | |
| * Author URI: http://tatianepires.com.br | |
| * Version: 1.0 | |
| */ | |
| /* | |
| * This program is free software: you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation, either version 3 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| */ | |
| /* | |
| * To enable Link Manager add to your functions.php file: | |
| add_filter( 'pre_option_link_manager_enabled', '__return_true' ); | |
| */ | |
| add_action( 'add_meta_boxes', 'tps_link_metabox' ); | |
| /* Do something with the data entered */ | |
| add_action( 'add_link', 'tps_link_meta_update_postdata' ); | |
| add_action( 'edit_link', 'tps_link_meta_update_postdata' ); | |
| /* Adds a box to the mainside column on the Link Manager edit screen */ | |
| function tps_link_metabox() { | |
| $screens = array( 'link' ); | |
| foreach ($screens as $screen) { | |
| add_meta_box( | |
| 'tps_link_box', | |
| 'Link Attributes', | |
| 'tps_link_inner_box', | |
| $screen, | |
| 'side', | |
| 'core', | |
| ); | |
| } | |
| } | |
| /* Prints the box content */ | |
| function tps_link_inner_box( $post ) { | |
| // Use nonce for verification | |
| wp_nonce_field( plugin_basename( __FILE__ ), 'tps_link_nonce' ); | |
| $tps_link_field_option_values = tps_link_get_option(tps_link_get_id()); | |
| $link_id = tps_link_get_id(); | |
| $is_yes_checked = ($tps_link_field_option_values['title'] === tps_link_get_option_value('YES')) ? 'checked' : ''; | |
| $is_no_checked = (!$is_yes_checked) ? 'checked' : ''; | |
| $tps_link_field_option_yes = tps_link_get_option_value('YES'); | |
| $tps_link_field_option_no = tps_link_get_option_value('NO'); | |
| //$tps_link_field_option_order = isset($tps_link_field_option_values['order']) ? intval($tps_link_field_option_values['order']) : 99; | |
| $tps_link_field_option_order = $tps_link_field_option_values['order']; | |
| echo "<!-- "; | |
| echo "tps_link_field_option_values: "; | |
| var_dump($tps_link_field_option_values); | |
| echo " -->"; | |
| echo <<<TPS_LINK_METABOX | |
| <div> | |
| <div class="inside" style="border-bottom: 1px solid #ccc;"> | |
| <strong>Title Link</strong> | |
| <p>Display this link at the top of it's category's list?</p> | |
| <div> | |
| <input type="radio" id="tps_link_field_is_title_yes" name="tps_link_field_is_title" value="$tps_link_field_option_yes" $is_yes_checked /> | |
| <label for="tps_link_field_is_title_yes">Yes</label> | |
| </div> | |
| <div> | |
| <input type="radio" id="tps_link_field_is_title_no" name="tps_link_field_is_title" value="$tps_link_field_option_no" $is_no_checked /> | |
| <label for="tps_link_field_is_title_no">No</label> | |
| </div> | |
| </div> | |
| <div class="inside"> | |
| <label for="tps_link_field_order"><strong>Link Order</strong> | |
| <p>Set the order to display the links inside the category.</p> | |
| <div> | |
| <input type="number" id="tps_link_field_order" name="tps_link_field_order" placeholder="0" value="$tps_link_field_option_order" /> | |
| </div> | |
| </div> | |
| </div> | |
| TPS_LINK_METABOX; | |
| } | |
| function tps_link_meta_update_postdata( $link_id ) { | |
| // verify if this is an auto save routine. | |
| // If it is our form has not been submitted, so we dont want to do anything | |
| if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) | |
| return; | |
| // verify this came from the our screen and with proper authorization, | |
| // because save_post can be triggered at other times | |
| if ( !isset( $_POST['tps_link_nonce'] ) || !wp_verify_nonce( $_POST['tps_link_nonce'], plugin_basename( __FILE__ ) ) ) | |
| return; | |
| // OK, we're authenticated: we need to find and save the data | |
| //sanitize user input | |
| $tps_link_data = array( | |
| 'title' => isset($_POST['tps_link_field_is_title']) ? sanitize_text_field($_POST['tps_link_field_is_title']) : $tps_link_field_options['NO'], | |
| 'order' => isset($_POST['tps_link_field_order']) ? intval(sanitize_text_field($_POST['tps_link_field_order'])) : 0, | |
| ); | |
| tps_link_update_option($link_id, $tps_link_data); | |
| } | |
| function tps_link_get_id() { | |
| $link_id = null; | |
| if (isset($_GET['link_id'])) { | |
| $link_id = $_GET['link_id']; | |
| } else { | |
| global $wpdb; | |
| $result = $wpdb->get_results( "SHOW TABLE STATUS LIKE 'wp_links'", ARRAY_A ); | |
| $link_id = $result[0]['Auto_increment']; | |
| } | |
| return $link_id; | |
| } | |
| function tps_link_option_name($link_id) { | |
| return sprintf('tps_link_options_%s', $link_id); | |
| } | |
| function tps_link_get_option($link_id) { | |
| $option = get_option(tps_link_option_name($link_id)); | |
| return unserialize($option); | |
| } | |
| function tps_link_update_option($link_id, $link_data) { | |
| $tps_link_option_name = tps_link_option_name($link_id); | |
| $tps_link_option_value = tps_link_get_option($link_id); | |
| $serialized_data = serialize($link_data); | |
| if ($link_option_value === false) { | |
| add_option($tps_link_option_name, $serialized_data); | |
| } else { | |
| update_option($tps_link_option_name, $serialized_data); | |
| } | |
| } | |
| function tps_link_get_option_value($option) { | |
| // Prevent that different values might be stored as this field's option | |
| $tps_link_field_options = array( | |
| 'YES' => 'yes', | |
| 'NO' => 'no', | |
| ); | |
| return $tps_link_field_options[$option]; | |
| } |
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