app2/pdo.php

<?php
try {
        /*$pdo = new PDO('mysql:host=localhost;port=8889;dbname=blog',
        'fred', 'zap');*/
        $pdo = new PDO('mysql:host=10.23.243.242;port=3306;dbname=blog', 
        'root', 'a15862340183');
} catch (Exception $e) {
    echo($e->getMessage());
       
    }
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    /*
GRANT ALL ON blog.* TO 'root'@'%' IDENTIFIED BY 'a15862340183';
CREATE DATABASE blog DEFAULT CHARACTER SET utf8;
CREATE TABLE users (
     user_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
 
  password VARCHAR(128) NOT NULL , 
    name VARCHAR(255) NOT NULL , 
          PRIMARY KEY(user_id)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

 CREATE TABLE article (
     article_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
  user_id INT UNSIGNED NOT NULL,
  headline TEXT,
        content TEXT,
        viewer INT UNSIGNED ,
        	public varchar(11),
        category varchar(128), 
          PRIMARY KEY(article_id),
       
  CONSTRAINT articc_ibfk_1
        FOREIGN KEY (user_id)
        REFERENCES users (user_id)
        ON DELETE CASCADE ON UPDATE CASCADE
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

    CREATE TABLE commentsss (
     id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
  comment_id INT UNSIGNED NOT NULL,
    feedback_id INT UNSIGNED ,
  name VARCHAR(128), 
    user_id INTEGER,
     article_id INT UNSIGNED,
  content TEXT,
          PRIMARY KEY(id),
  CONSTRAINT articcc_ibfk_1
        FOREIGN KEY (article_id)
        REFERENCES article (article_id)
        ON DELETE CASCADE ON UPDATE CASCADE
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

   
*/