Checkbox that saves real-time value

Please help me as I create a checkbox that saves the value in real time and that appears on all pages if clicked or not.
From already I thank you
Sorry bad English

    <div class="toggle">
        <label>
          <input id="checkValue" name="checkbox" type="checkbox" />           
          <span class="slider"></span>
        </label>
    </div>
    
    <?php
        
    
    if(isset($_POST['checkbox'])) {
        update_post_meta( 1, 'metakey', 'meta_valor1' );
    } else { 
        update_post_meta( 1, 'metakey', 'meta_value2' );
    }

• This topic was modified 5 years, 5 months ago by Steven Stern (sterndata).