问限制帖子标题的字数

EN

<?php echo wp_trim_words( get_the_title(), 5 ); ?>

add_action( 'admin_head-post.php', 'so_13816272_limit_input_title' );

function so_13816272_limit_input_title(  )
{
    global $current_screen;
    // Not our post type, exit earlier
    if( 'post' != $current_screen->post_type )
        return;
    ?>
    <script type="text/javascript">
        jQuery(document).ready( function($) 
        {
            $('#title').keyup( function() 
            {
                var $this = $(this);
                if($this.val().length > 50)
                    $this.val($this.val().substr(0, 50));           
            });           
        });     
    </script>
    <?php 
}