add_action在另一个函数中无法正常工作，需要管理员通知 _WordPress主题

我创建了自定义的divi模块, 然后将其转换为插件。现在, 我仅在激活Divi主题时才想激活插件。当我以这种方式编写代码时, 每次都会显示通知。

function my_admin_notice(){ echo '< div class="updated"> < p> test Admin notice.< /p> < /div> '; } add_action('admin_notices', 'my_admin_notice');

但是当我用基于条件的代码编写代码时

function angelleye_setup_For_paypal_divi_install() { if (function_exists('et_setup_theme')) { // Divi is the current theme or the active theme's parent. // trigger our function that registers PayPal for Divi plugin. angelleye_setup_for_paypal_divi(); } else{ // code when theme is not activated. add_action('admin_notices', 'my_admin_notice'); } } register_activation_hook( __FILE__, 'angelleye_setup_For_paypal_divi_install' ); function my_admin_notice(){ echo '< div class="updated"> < p> test Admin notice.< /p> < /div> '; }

我在这里复制了用于显示管理员通知的代码https://wptheming.com/2011/08/admin-notices-in-wordpress/
现在, 我在函数angelleye_setup_For_paypal_divi_install中调用add_action, 但是在函数add_action无法正常工作。
#1【add_action在另一个函数中无法正常工作，需要管理员通知】你在错误的位置添加条件。请从这里删除条件。

/** * The code that runs during plugin activation. * */ function angelleye_setup_For_paypal_divi_install() {angelleye_setup_for_paypal_divi(); } register_activation_hook( __FILE__, 'angelleye_setup_For_paypal_divi_install' );

激活功能后添加此代码以显示管理员通知

/* Display a notice that can be dismissed */ function my_custom_notice() { ?> < div class="update-nag notice"> < p> < ?php _e( 'Please install Divi theme to use PayPal Divi Module!', 'angelleye_paypal_divi' ); ?> < /p> < /div> < ?php } $theme = wp_get_theme(); if($theme != 'Divi' ) { add_action( 'admin_notices', 'my_custom_notice' ); }

#2你的代码的问题在于, 你缺少https://codex.wordpress.org/Plugin_API/Action_Reference/admin_notices中提到的管理员通知{class}和{message}的两个要求
尝试

function angelleye_setup_For_paypal_divi_install() { if (function_exists('et_setup_theme')) { // Divi is the current theme or the active theme's parent. // trigger our function that registers PayPal for Divi plugin. angelleye_setup_for_paypal_divi(); } else{ // code when theme is not activated. add_action( 'admin_notices', 'sample_admin_notice__success' ); } } register_activation_hook( __FILE__, 'angelleye_setup_For_paypal_divi_install' ); function sample_admin_notice__success() { ?> < div class="notice notice-success is-dismissible"> < p> < ?php _e( 'Done!', 'sample-text-domain' ); ?> < /p> < /div> < ?php }