json_decode 作为全局变量

Question

我正在尝试为客户端网站 (wordpress) 上的控制台制作一些信息小部件。下面的代码可以根据我的需要完美运行。

$url = 'https://example.site/wp-json/';

function _dashboard_clients_info()
{

    global $url;

    $request = wp_remote_get(esc_url_raw($url));

    if (is_wp_error($request)) {
        return false;
    }

    $html = wp_remote_retrieve_body($request);
    $data = json_decode($html);

    $head = current(array_filter($data, function ($current) {
        return $current->_ID == 2;
    }));

    $posts = $data;

    $foot = current(array_filter($data, function ($current) {
        return $current->_ID == 3;
    }));

    $exclude = array(1, 2, 3, 4);

    if (!empty($head->dash_description)) {
        echo wpautop('<div class="dash_head">' . $head->dash_description . '</div>');
        echo $head->html_css_js;
    } else {
    };

    foreach ($posts as $post) {
        if (!in_array($post->_ID, $exclude)) {
            if (!empty($posts)) {
                echo '<div class="dash_post">';
                echo '<h3 class="dash_title">' . $post->dash_title . '</h3>';
                echo wpautop('<div class="dash_description">' . $post->dash_description . '</div>');
                echo $post->html_css_js;
                echo '</div>';
            }
        } else {
        };
    }

    if (!empty($foot->dash_description)) {
        echo wpautop('<div class="dash_foot">' . $foot->dash_description . '</div>');
        echo $foot->html_css_js;
    } else {
    };
}

function _add_dashboard_clients_widget()
{
    global $url;

    $request = wp_remote_get(esc_url_raw($url));

    if (is_wp_error($request)) {
        return false;
    }

    $html = wp_remote_retrieve_body($request);
    $data = json_decode($html);

    $title = current(array_filter($data, function ($current) {
        return $current->_ID == 1;
    }));

    if (!empty($title->dash_description)) {
        $title = '<div class="dash_title">' . $title->dash_description . '</div>';
    } else {
    };

    add_meta_box('dashboard-clients-info', '' . $title . '', '_dashboard_clients_info', $screen, 'normal', 'high');
}
add_action('wp_dashboard_setup', '_add_dashboard_clients_widget');

但我知道它并不完美。特别是，我必须包含 $url 两次才能获得小部件的标题和正文。

我想将$data 变量设为全局变量，以便一次性获取$url，然后获取我需要的东西。我试过这样，但由于某种原因它不起作用，它没有返回任何东西。

$url = 'https://example.site/wp-json/';

$request = wp_remote_get(esc_url_raw($url));

if (is_wp_error($request)) {
    return false;
}

$html = wp_remote_retrieve_body($request);
$data = json_decode($html);

function _dashboard_clients_info()
{

    global $data;

    $head = current(array_filter($data, function ($current) {
        return $current->_ID == 2;
    }));

    $posts = $data;

    $foot = current(array_filter($data, function ($current) {
        return $current->_ID == 3;
    }));

    $exclude = array(1, 2, 3, 4);

    if (!empty($head->dash_description)) {
        echo wpautop('<div class="dash_head">' . $head->dash_description . '</div>');
        echo $head->html_css_js;
    } else {
    };

    foreach ($posts as $post) {
        if (!in_array($post->_ID, $exclude)) {
            if (!empty($posts)) {
                echo '<div class="dash_post">';
                echo '<h3 class="dash_title">' . $post->dash_title . '</h3>';
                echo wpautop('<div class="dash_description">' . $post->dash_description . '</div>');
                echo $post->html_css_js;
                echo '</div>';
            }
        } else {
        };
    }

    if (!empty($foot->dash_description)) {
        echo wpautop('<div class="dash_foot">' . $foot->dash_description . '</div>');
        echo $foot->html_css_js;
    } else {
    };
}

function _add_dashboard_clients_widget()
{
    global $data;

    $title = current(array_filter($data, function ($current) {
        return $current->_ID == 1;
    }));

    if (!empty($title->dash_description)) {
        $title = '<div class="dash_title">' . $title->dash_description . '</div>';
    } else {
    };

    add_meta_box('dashboard-clients-info', 'test', '_dashboard_clients_info', $screen, 'normal', 'high');
}
add_action('wp_dashboard_setup', '_add_dashboard_clients_widget');

我将不胜感激在改进这一点的任何帮助。我只是在学习，我尝试通过这种方式获取知识）））

Answer 1

您可以在wp-config.php、主题的functions.php 或插件的“根”文件（例如my-plugin.php）中轻松定义您的API URL：

define( 'DASHBOARD_API_URL', 'https://example.site/wp-json/' );

然后，使用定义的DASHBOARD_API_URL 创建一个接收仪表板数据的方法：

function wp68412621_get_dashboard_data() {
    $response = wp_remote_get( DASHBOARD_API_URL );

    if ( is_wp_error( $response ) ) {
        return false;
    }
    
    return wp_remote_retrieve_body( $response );
}

您应该使用transients 来缓存API 响应以避免过多的API 调用。我们把之前的方法调整为：

function wp68412621_get_dashboard_data() {
    $transient_key = 'dashboard_data';
    $dashboard_data = get_transient( $transient_key );
    
    if ( false === $dashboard_data ) {
        $response = wp_remote_get( DASHBOARD_API_URL );

        if ( is_wp_error( $response ) ) {
            return false;
        }
    
        $dashboard_data = wp_remote_retrieve_body( $response );
        set_transient( $transientKey, $dashboard_data, 900 );
    }
    
    return $dashboard_data;
}

然后，您可以从任何其他方法调用数据方法：

function wp68412621_dashboard_clients_info()
{
    $data = wp68412621_get_dashboard_data();
    
    if ( empty( $data ) ) {
        return false;
    }

    // ...
}

function wp68412621_add_dashboard_clients_widget()
{
    $data = wp68412621_get_dashboard_data();
    
    if ( empty( $data ) ) {
        return false;
    }

    // ...
}
add_action( 'wp_dashboard_setup', 'wp68412621_add_dashboard_clients_widget' );