插件激活后创建表单

register_activation_hook(__FILE__, 'cdu_activae_plugin');

function cdu_activae_plugin(){
    global $wpdb;
    $table_name = $wpdb->prefix . 'students_data';

    $sql = "CREATE TABLE {$table_name} (
	`id` INT(10) NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(50) NULL DEFAULT NULL COLLATE 'utf8mb4_unicode_520_ci',
	`email` VARCHAR(50) NULL DEFAULT NULL COLLATE 'utf8mb4_unicode_520_ci',
	`age` INT(10) NULL DEFAULT NULL,
	`phone` VARCHAR(50) NULL DEFAULT NULL COLLATE 'utf8mb4_unicode_520_ci',
	`photo` VARCHAR(120) NULL DEFAULT NULL COLLATE 'utf8mb4_unicode_520_ci',
	PRIMARY KEY (`id`)
)
COLLATE='utf8mb4_unicode_520_ci'
ENGINE=InnoDB
";

require_once(ABSPATH . 'wp-admin/includes/upgrade.php');

dbDelta($sql);
}