如何在管理区域不显示插件

我刚刚开始wordpress开发。我正在尝试创建一个简单的插件，用于显示表中db的结果。我可以做到这一点，但我对显示在管理页面顶部的插件有问题。我不知道为什么会这样。

我的插件功能：

add_action(\'init\',\'hello_world\');
    function hello_world()
    {

        global $wpdb;
        $query = "Select ID, post_title
                  From $wpdb->posts Limit 0, 10";
        $results = $wpdb->get_results($query, ARRAY_A);

        echo "<div class=\\"datagrid\\"><table>";
        echo "<thead><tr><th>header</th><th>header</th><th>header</th><th>header</th></tr></thead>";
        echo "<tfoot>
                    <tr>
                    <td colspan=\\"4\\">
                        <div id=\\"paging\\">
                            <ul>
                                <li>
                                    <a href=\\"#\\"><span>Previous</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\" class=\\"active\\"><span>1</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\"><span>2</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\"><span>3</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\"><span>4</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\"><span>5</span></a>
                                </li>
                                <li>
                                    <a href=\\"#\\"><span>Next</span></a>
                                 </li>
                            </ul>
                        </div>
                    </tr>
                </tfoot>";
        echo "<tbody>";
        $i = 0;
        while($i < 10)
        {
            foreach ($results as $item)
            {
                $postID = $item[\'ID\'];
                $postTitle = $item[\'post_title\'];

                echo "<tr class=\\"alt\\">";
                echo "<td>" .$postID."</td>";
                echo "<td>".$postTitle."</td>";
                echo "</tr>";
                $i++;
            }
        }

        echo "</tbody>";
        echo "</table></div>";
    }

正在调用索引。php

    <?php
        if(is_admin())
        {

        }
        else
        {
            if(function_exists(\'hello_world\')) {
                echo "<div>";
                hello_world();
                echo "</div>";
            }
        }
    ?>

我怎样才能防止它显示在管理部分？

<?php /* * Plugin Name: Custom Action */ add_action( \'call_hello_world\', \'hello_world\' ); /** * Demo function. * * Usage: * do_action( \'call_hello_world\' ); * * @wp-hook call_hello_world * @return void */ function hello_world() { print \'<h1>Hello World!</h1>\'; } // static class method add_action( \'call_static_method\', array ( \'Demo_Class\', \'static_method\' ); // dynamic class method $demo = new Demo_Class; add_action( \'call_dynamic_method\', array ( $demo, \'dynamic_method\' ); class Demo_Class { public static function static_method() { print \'I was called statically.\'; } public function dynamic_method() { print \'I was called with an instance.\'; } }

小码农CODE

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