如果用户登录，我的代码工作正常，但注销时不工作

functions.php

//ajax search --
// add the ajax fetch js
add_action( \'wp_footer\', \'ajax_fetch\' );
function ajax_fetch() {
?>
<script type="text/javascript">
function fetch(){

    jQuery.ajax({
        url: \'<?php echo admin_url(\'admin-ajax.php\'); ?>\',
        type: \'POST\',
        data: { action: \'data_fetch\', keyword: jQuery(\'#keyword\').val() },
        success: function(data) {
            jQuery(\'#datafetch\').html( data );
        }
    });

}
</script>

<?php
}
// the ajax function
add_action(\'wp_ajax_data_fetch\' , \'data_fetch\');
add_action(\'wp_ajax_nopriv_data_fetch\',\'data_fetch\');
function data_fetch(){
    $the_query = new WP_Query( array( \'posts_per_page\' => 5, \'s\' => esc_attr( $_POST[\'keyword\'] ) ) );
    if( $the_query->have_posts() ) :
        while( $the_query->have_posts() ): $the_query->the_post(); ?>

            <div class="post-box-search">
              <a href="<?php echo esc_url( post_permalink() ); ?>">
                <?php the_post_thumbnail( \'index_post\' );  ?>
                <h3><?php the_title();?></h3>
              </a>
            </div>

        <?php endwhile;
        wp_reset_postdata();
    endif;
    die();
}





 ?>