您可以使用插件进行前端发布：

• Post From Site
• uCan Post
• WP User Frontend

    <!-- New Post Form -->
<div id="postbox">
<form id="new_post" name="new_post" method="post" action="">
<p><label for="title">Title</label><br />
<input type="text" id="title" value="" tabindex="1" size="20" name="title" />
</p>
<p><label for="description">Description</label><br />
<textarea id="description" tabindex="3" name="description" cols="50" rows="6"></textarea>
</p>
<p><?php wp_dropdown_categories( \'show_option_none=Category&tab_index=4&taxonomy=category\' ); ?></p>
<p><label for="post_tags">Tags</label>
<input type="text" value="" tabindex="5" size="16" name="post_tags" id="post_tags" /></p>
<p align="right"><input type="submit" value="Publish" tabindex="6" id="submit" name="submit" /></p>
<input type="hidden" name="action" value="new_post" />
<?php wp_nonce_field( \'new-post\' ); ?>
</form>
</div>
<!--// New Post Form -->

   if( \'POST\' == $_SERVER[\'REQUEST_METHOD\'] && !empty( $_POST[\'action\'] ) &&  ($_POST[\'action\']== \'new_post\')) {

    if (isset ($_POST[\'title\'])) {
        $title =  $_POST[\'title\'];
    } else {
        echo \'Please enter a title\';
    }
    if (isset ($_POST[\'description\'])) {
        $description = $_POST[\'description\'];
    } else {
        echo \'Please enter the content\';
    }
    $tags = $_POST[\'post_tags\'];

    $new_post = array(
        \'post_title\'    => $title,
        \'post_content\'  => $description,
        \'post_category\' => $_POST[\'cat\'],  
        \'tags_input\'    => $tags,
        \'post_status\'   => \'draft\'
    );
    wp_insert_post($new_post);  

}

根据您的要点代码和注释进行更新将您的功能更改为：

 if( \'POST\' == $_SERVER[\'REQUEST_METHOD\'] && !empty( $_POST[\'action\'] ) && ($_POST[\'action\']== \'new_post\')) {
        $has_errors = false;
        if (isset ($_POST[\'title\'])) {
            $title = $_POST[\'title\'];
        } else {
            echo \'Please enter a title\';
            $has_errors = true;
        }
        if (isset ($_POST[\'performer\'])) {
            $performer = $_POST[\'preformer\'];
        } else {
            echo \'Please enter a performer\';
            $has_errors = true;
        }
        if (isset ($_POST[\'composer\'])) {
          $composer = $_POST[\'composer\'];
        } else {
            echo \'Please enter a composer\';
            $has_errors = true;
        }
        if (isset ($_POST[\'tablature\'])) {
            $tablature = $_POST[\'tablature\'];
        } else {
            echo \'Please enter the content\';
            $has_errors = true;
        }
        $tags = $_POST[\'post_tags\'];
        if (!$has_errors){
        //save <title>  by: <preformer>
        $title .= " by: " .$performer;

        //save Composed by: <composer> Performed by: <performer> <tablature>
        $content = "<h4>Composed by: ". $composer."</h4><br/><h4>Performed by: ".$performer."</h4><br/>".$tablature;

        $new_post = array(
            \'post_title\' => $title,
            \'post_content\' => $content,
            \'post_category\' => $_POST[\'cat\'],
            \'tags_input\' => $tags,
            \'post_status\' => \'draft\'
        );
        $pid = wp_insert_post($new_post);


        //save email and submmiter as post meta in custom fields
        update_post_meta($pid, \'submiter_email\', urldecode($_POST[\'email\']));
        update_post_meta($pid, \'submiter_name\', urldecode($_POST[\'submitter\']));
    }
}