我正在制作一个 wordpress 插件,我在主 php 文件中有函数:
<?php
include_once "define.php";
include_once 'includes/form_processor.php';
include_once 'includes/email_subscriber.php';
include_once 'includes/options_page.php';
include_once 'includes/widget.php';
//register the plugin installation methods
register_activation_hook(__FILE__, 'install_simple_subscriber_plugin');
register_deactivation_hook(__FILE__, 'uninstall_simple_subscriber_plugin');
//register the plugin url
wp_enqueue_style('simple-email-subscriber-css', plugins_url('/simple_email_subscriber/stylesheets/style.css'));
function install_simple_subscriber_plugin(){
add_action('plugins_loaded', 'setup_plugin_actions');
email_subscriber::install_database();
email_subscriber::update_database();
}
function setup_plugin_actions(){
if(has_action('publish_post')){
$simple_email_subscriber = new email_subscriber();
//add action listener to post publication
add_action('publish_post', array($simple_email_subscriber, 'on_publish_post'));
add_action('publish__future_post', array($simple_email_subscriber, 'on_publish_post'));
}
//add the admin menu pages
$options_page = new options_page();
}
function uninstall_simple_subscriber_plugin(){
remove_action('plugins_loaded', 'setup_plugin_actions');
}
?>
在我的自定义课程中,我有:
<?php
class email_subscriber{
/*
* Plugin Core Methods
* */
static function install_database() {
//define create table query
$sql = "CREATE TABLE IF NOT EXISTS ".SIMPLE_EMAIL_SUBSCRIBER_DB_NAME."(
id mediumint(9) NOT NULL AUTO_INCREMENT,
subscribe_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
email VARCHAR(55) NOT NULL,
UNIQUE KEY id (id)
);";
//update db and make it auto adjust
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
}
//HERE IS THE NEW BITS ADDED TO THE EXISTING PLUGIN THAT'S NOT GET CALLED
static function update_database(){
$sql=
"DELIMITER $$
CREATE PROCEDURE Alter_Table()
BEGIN
DECLARE _count INT;
SET _count = ( SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'email_subscription' AND
COLUMN_NAME = 'subscribe_all');
IF _count = 0 THEN
ALTER TABLE ".SIMPLE_EMAIL_SUBSCRIBER_DB_NAME."
ADD COLUMN subscribe_all TINYINT(1) DEFAULT 1,
ADD COLUMN subscribe_category varchar(512) DEFAULT NULL;
END IF;
END $$
DELIMITER ;
CALL Alter_Table();
DROP PROCEDURE Alter_Table;
";
//update db and make it auto adjust
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);
//add the options for db defination
add_option("ses_db_version", SES_PLUGIN_VERSION);
}
.................and other codes
}
update_database() 方法是我添加的新方法,它试图更新数据库以获得额外的功能。但是当插件激活时它永远不会运行。