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✏️ Editing: admin-subpage.php

<?php

/**
 * CFDB7 Admin subpage
 */

if (!defined( 'ABSPATH')) exit;

/**
 * Cfdb7_Wp_List_Table class will create the page to load the table
 */
class CFDB7_Wp_Sub_Page
{
    private $form_post_id;

/**
     * Constructor start subpage
     */
    public function __construct()
    {
        $this->form_post_id = (int) $_GET['fid'];
        $this->list_table_page();

}
    /**
     * Display the list table page
     *
     * @return Void
     */
    public function list_table_page()
    {
        $ListTable = new CFDB7_List_Table();
        $ListTable->prepare_items();
        ?>
            <div class="wrap">
                <div id="icon-users" class="icon32"></div>
                <h2><?php echo get_the_title( $this->form_post_id ); ?></h2>
                <form method="post" action="">

<?php $ListTable->search_box('Search', 'search'); ?>
                    <?php $ListTable->display(); ?>
                </form>
            </div>
        <?php
    }

}
// WP_List_Table is not loaded automatically so we need to load it in our application
if( ! class_exists( 'WP_List_Table' ) ) {
    require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
}
/**
 * Create a new table class that will extend the WP_List_Table
 */
class CFDB7_List_Table extends WP_List_Table
{
    private $form_post_id;
    private $column_titles;

public function __construct() {

parent::__construct(
            array(
                'singular' => 'contact_form',
                'plural'   => 'contact_forms',
                'ajax'     => false
            )
        );

}

/**
     * Prepare the items for the table to process
     *
     * @return Void
     */
    public function prepare_items()
    {

$this->form_post_id =  (int) $_GET['fid'];
        $search = empty( $_REQUEST['s'] ) ? false :  esc_sql( $_REQUEST['s'] );
        $form_post_id  = $this->form_post_id;

global $wpdb;

$this->process_bulk_action();

$cfdb        = apply_filters( 'cfdb7_database', $wpdb );
        $table_name  = $cfdb->prefix.'db7_forms';
        $columns     = $this->get_columns();
        $hidden      = $this->get_hidden_columns();
        $sortable    = $this->get_sortable_columns();
        $data        = $this->table_data();

//usort( $data, array( &$this, 'sort_data' ) );

$perPage     = 100;
        $currentPage = $this->get_pagenum();
        if ( ! empty($search) ) {

$totalItems  = $cfdb->get_var("SELECT COUNT(*) FROM $table_name WHERE form_value LIKE '%$search%' AND form_post_id = '$form_post_id' ");
        }else{

$totalItems  = $cfdb->get_var("SELECT COUNT(*) FROM $table_name WHERE form_post_id = '$form_post_id'");
        }

$this->set_pagination_args( array(
            'total_items' => $totalItems,
            'per_page'    => $perPage
        ) );
        $this->_column_headers = array($columns, $hidden ,$sortable);
        $this->items = $data;
    }
    /**
     * Override the parent columns method. Defines the columns to use in your listing table
     *
     * @return Array
     */
    public function get_columns()
    {
        $form_post_id  = $this->form_post_id;

global $wpdb;
        $cfdb          = apply_filters( 'cfdb7_database', $wpdb );
        $table_name    = $cfdb->prefix.'db7_forms';
        $results       = $cfdb->get_results( "
            SELECT * FROM $table_name 
            WHERE form_post_id = $form_post_id ORDER BY form_id DESC LIMIT 1", OBJECT 
        );

$first_row            = isset($results[0]) ? unserialize( $results[0]->form_value ): 0 ;
        $columns              = array();
        $rm_underscore        = apply_filters('remove_underscore_data', true);

if( !empty($first_row) ){
            //$columns['form_id'] = $results[0]->form_id;
            $columns['cb']      = '<input type="checkbox" />';
            foreach ($first_row as $key => $value) {

$matches = array();
                $key     = esc_html( $key );

if ( $key == 'cfdb7_status' ) continue;

if( $rm_underscore ) preg_match('/^_.*$/m', $key, $matches);
                if( ! empty($matches[0]) ) continue;

$key_val       = str_replace( array('your-', 'cfdb7_file'), '', $key);
                $key_val       = str_replace( array('_', '-'), ' ', $key_val);
                $columns[$key] = ucwords( $key_val );
                
                $this->column_titles[] = $key_val;

if ( sizeof($columns) > 4) break;
            }
            $columns['form-date'] = 'Date';
        }

return $columns;
    }
    /**
     * Define check box for bulk action (each row)
     * @param  $item
     * @return checkbox
     */
    public function column_cb($item){
        return sprintf(
             '<input type="checkbox" name="%1$s[]" value="%2$s" />',
             $this->_args['singular'],
             $item['form_id']
        );
    }
    /**
     * Define which columns are hidden
     *
     * @return Array
     */
    public function get_hidden_columns()
    {
        return  array('form_id');
    }
    /**
     * Define the sortable columns
     *
     * @return Array
     */
    public function get_sortable_columns()
    {
       return array('form-date' => array('form-date', true));
    }
    /**
     * Define bulk action
     * @return Array
     */
    public function get_bulk_actions() {

return array(
            'read'   => __( 'Read', 'contact-form-cfdb7' ),
            'unread' => __( 'Unread', 'contact-form-cfdb7' ),
            'delete' => __( 'Delete', 'contact-form-cfdb7' )
        );

}
    /**
     * Get the table data
     *
     * @return Array
     */
    private function table_data()
    {
        $data = array();
        global $wpdb;
        $cfdb         = apply_filters( 'cfdb7_database', $wpdb );
        $search       = empty( $_REQUEST['s'] ) ? false :  esc_sql( $_REQUEST['s'] );
        $table_name   = $cfdb->prefix.'db7_forms';
        $page         = $this->get_pagenum();
        $page         = $page - 1;
        $start        = $page * 100;
        $form_post_id = $this->form_post_id;

$orderby = isset($_GET['orderby']) ? 'form_date' : 'form_id';
        $order   = isset($_GET['order']) && $_GET['order'] == 'asc' ? 'ASC' : 'DESC';

if ( ! empty($search) ) {

$results = $cfdb->get_results( "SELECT * FROM $table_name 
                        WHERE  form_value LIKE '%$search%'
                        AND form_post_id = '$form_post_id'
                        ORDER BY $orderby $order
                        LIMIT $start,100", OBJECT 
                    );
        }else{

$results = $cfdb->get_results( "SELECT * FROM $table_name 
                        WHERE form_post_id = $form_post_id
                        ORDER BY $orderby $order
                        LIMIT $start,100", OBJECT 
                    );
        }

foreach ( $results as $result ) {

$form_value = unserialize( $result->form_value );

$link  = "<b><a href=admin.php?page=cfdb7-list.php&fid=%s&ufid=%s>%s</a></b>";
            if(isset($form_value['cfdb7_status']) && ( $form_value['cfdb7_status'] === 'read' ) )
                $link  = "<a href=admin.php?page=cfdb7-list.php&fid=%s&ufid=%s>%s</a>";

$fid                    = $result->form_post_id;
            $form_values['form_id'] = $result->form_id;

foreach ( $this->column_titles as $col_title) {
                $form_value[ $col_title ] = isset( $form_value[ $col_title ] ) ?
                                $form_value[ $col_title ] : '';
            }

foreach ($form_value as $k => $value) {

$ktmp = $k;

$can_foreach = is_array($value) || is_object($value);

if ( $can_foreach ) {

foreach ($value as $k_val => $val):
                        $val                = esc_html( $val );
                        $form_values[$ktmp] = ( strlen($val) > 150 ) ? substr($val, 0, 150).'...': $val;
                        $form_values[$ktmp] = sprintf($link, $fid, $result->form_id, $form_values[$ktmp]);

endforeach;
                }else{
                    $value = esc_html( $value );
                    $form_values[$ktmp] = ( strlen($value) > 150 ) ? substr($value, 0, 150).'...': $value;
                    $form_values[$ktmp] = sprintf($link, $fid, $result->form_id, $form_values[$ktmp]);
                }

}
            $form_values['form-date'] = sprintf($link, $fid, $result->form_id, $result->form_date );
            $data[] = $form_values;
        }

return $data;
    }
    /**
     * Define bulk action
     *
     */
    public function process_bulk_action(){

global $wpdb;
        $cfdb       = apply_filters( 'cfdb7_database', $wpdb );
        $table_name = $cfdb->prefix.'db7_forms';
        $action     = $this->current_action();

if ( !empty( $action ) ) {

$nonce        = filter_input( INPUT_POST, '_wpnonce', FILTER_SANITIZE_STRING );
            $nonce_action = 'bulk-' . $this->_args['plural'];

if ( !wp_verify_nonce( $nonce, $nonce_action ) ){

wp_die( 'Not valid..!!' );
            }
        }

$form_ids = isset( $_POST['contact_form'] ) ? $_POST['contact_form'] : array();

if( 'delete' === $action ) {

foreach ($form_ids as $form_id):
                
                $form_id       = (int) $form_id;
                $results       = $cfdb->get_results( "SELECT * FROM $table_name WHERE form_id = '$form_id' LIMIT 1", OBJECT );
                $result_value  = $results[0]->form_value;
                $result_values = unserialize($result_value);
                $upload_dir    = wp_upload_dir();
                $cfdb7_dirname = $upload_dir['basedir'].'/cfdb7_uploads';

foreach ($result_values as $key => $result) {

if ( ( strpos($key, 'cfdb7_file') !== false ) &&
                        ! empty( $result ) && 
                        file_exists($cfdb7_dirname.'/'.$result) ) {

unlink($cfdb7_dirname.'/'.$result);
                    }

}

$cfdb->delete(
                    $table_name ,
                    array( 'form_id' => $form_id ),
                    array( '%d' )
                );
            endforeach;

}else if( 'read' === $action ){

foreach ($form_ids as $form_id):

$form_id       = (int) $form_id;
                $results       = $cfdb->get_results( "SELECT * FROM $table_name WHERE form_id = '$form_id' LIMIT 1", OBJECT );
                $result_value  = $results[0]->form_value;
                $result_values = unserialize( $result_value );
                $result_values['cfdb7_status'] = 'read';
                $form_data = serialize( $result_values );
                $cfdb->query(
                    "UPDATE $table_name SET form_value = '$form_data' WHERE form_id = '$form_id'"
                );

endforeach;

}else if( 'unread' === $action ){

foreach ($form_ids as $form_id):
                
                $form_id       = (int) $form_id;
                $results       = $cfdb->get_results( "SELECT * FROM $table_name WHERE form_id = '$form_id' LIMIT 1", OBJECT );
                $result_value  = $results[0]->form_value;
                $result_values = unserialize( $result_value );
                $result_values['cfdb7_status'] = 'unread';
                $form_data = serialize( $result_values );
                $cfdb->query(
                    "UPDATE $table_name SET form_value = '$form_data' WHERE form_id = '$form_id'"
                );
            endforeach;
        }

}
    /**
     * Define what data to show on each column of the table
     *
     * @param  Array $item        Data
     * @param  String $column_name - Current column name
     *
     * @return Mixed
     */
    public function column_default( $item, $column_name )
    {
        return $item[ $column_name ];

}
    /**
     * Allows you to sort the data by the variables set in the $_GET
     *
     * @return Mixed
     */
    private function sort_data( $a, $b )
    {
        // Set defaults
        $orderby = 'form_date';
        $order = 'ASC';
        // If orderby is set, use this as the sort column
        if(!empty($_GET['orderby']))
        {
            $orderby = $_GET['orderby'] === 'form_id' ? 'form_id' : 'form_date';
        }
        // If order is set use this as the order
        if(!empty($_GET['order']))
        {
            $order = $_GET['order'] === 'asc' ? 'ASC' : 'DESC';
        }
        $result = strcmp( $a[$orderby], $b[$orderby] );
        if($order === 'asc')
        {
            return $result;
        }
        return -$result;
    }
    /**
     * Display the bulk actions dropdown.
     *
     * @since 3.1.0
     * @access protected
     *
     * @param string $which The location of the bulk actions: 'top' or 'bottom'.
     *                      This is designated as optional for backward compatibility.
     */
    protected function bulk_actions( $which = '' ) {
        if ( is_null( $this->_actions ) ) {
            $this->_actions = $this->get_bulk_actions();
            /**
             * Filters the list table Bulk Actions drop-down.
             *
             * The dynamic portion of the hook name, `$this->screen->id`, refers
             * to the ID of the current screen, usually a string.
             *
             * This filter can currently only be used to remove bulk actions.
             *
             * @since 3.5.0
             *
             * @param array $actions An array of the available bulk actions.
             */
            $this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions );
            $two = '';
        } else {
            $two = '2';
        }

if ( empty( $this->_actions ) )
            return;

echo '<label for="bulk-action-selector-' . esc_attr( $which ) . '" class="screen-reader-text">' . __( 'Select bulk action', 'contact-form-cfdb7' ) . '</label>';
        echo '<select name="action' . $two . '" id="bulk-action-selector-' . esc_attr( $which ) . "\">\n";
        echo '<option value="-1">' . __( 'Bulk Actions', 'contact-form-cfdb7' ) . "</option>\n";

foreach ( $this->_actions as $name => $title ) {
            $class = 'edit' === $name ? ' class="hide-if-no-js"' : '';

echo "\t" . '<option value="' . $name . '"' . $class . '>' . $title . "</option>\n";
        }

echo "</select>\n";

submit_button( __( 'Apply', 'contact-form-cfdb7' ), 'action', '', false, array( 'id' => "doaction$two" ) );
        echo "\n";
        $nonce = wp_create_nonce( 'dnonce' );

echo "<a href='".esc_html($_SERVER['REQUEST_URI'])."&csv=true&nonce=".$nonce."' style='float:right; margin:0;' class='button'>";
        _e( 'Export CSV', 'contact-form-cfdb7' );
        echo '</a>';
        do_action('cfdb7_after_export_button');
    }
}

MR SKB