PHP MYSQL Address Book

0-PHP-ADDRESS-BOOK.MD

PHP MYSQL ADDRESS BOOK

https://code-boxx.com/simple-address-book-php-mysql/

NOTES

1. Create a test database and import 1-address-book.sql.
2. Change the database settings in 2-lib.php to your own.
3. Launch 4a-book.php in the browser.

LICENSE

Copyright by Code Boxx

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

1-address-book.sql

CREATE TABLE `address_book` (
  `id` bigint(20) NOT NULL,
  `name` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `tel` varchar(255) NOT NULL,
  `address` text NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

ALTER TABLE `address_book`
  ADD PRIMARY KEY (`id`),
  ADD KEY `email` (`email`),
  ADD KEY `name` (`name`),
  ADD KEY `tel` (`tel`);

ALTER TABLE `address_book`
  MODIFY `id` bigint(20) NOT NULL AUTO_INCREMENT;

2-lib.php

<?php
class AddressBook {
  // (A) CONSTRUCTOR - CONNECT TO DATABASE
  private $pdo = null;
  private $stmt = null;
  public $lastID = null;
  public $error = "";
  function __construct () {
    $this->pdo = new PDO(
      "mysql:host=".DB_HOST.";dbname=".DB_NAME.";charset=".DB_CHARSET,
      DB_USER, DB_PASSWORD, [
      PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
      PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
    ]);
  }

  // (B) DESTRUCTOR - CLOSE DATABASE CONNECTION
  function __destruct () {
    if ($this->stmt!==null) { $this->stmt = null; }
    if ($this->pdo!==null) { $this->pdo = null; }
  }

  // (C) EXECUTE SQL QUERY
  function query ($sql, $data=null) : void {
    $this->stmt = $this->pdo->prepare($sql);
    $this->stmt->execute($data);
  }

  // (D) GET ENTRY
  function get ($id=null) {
    $this->query(
      "SELECT * FROM `address_book`" . ($id==null ? "" : " WHERE `id`=?"),
      $id==null ? null : [$id]
    );
    return $id==null ? $this->stmt->fetchAll() : $this->stmt->fetch() ;
  }

  // (E) SAVE ENTRY
  function save ($name, $email, $tel, $addr, $id=null) {
    // (E1) NEW OR UPDATE
    if ($id===null) {
      $sql = "INSERT INTO `address_book` (`name`, `email`, `tel`, `address`) VALUES (?,?,?,?)";
      $data = [$name, $email, $tel, $addr];
    } else {
      $sql = "UPDATE `address_book` SET `name`=?, `email`=?, `tel`=?, `address`=? WHERE `id`=?";
      $data = [$name, $email, $tel, $addr, $id];
    }

    // (E2) RUN
    $this->query($sql, $data);
    return true;
  }

  // (F) DELETE ENTRY
  function del ($id) {
    $this->query("DELETE FROM `address_book` WHERE `id`=?", [$id]);
    return true;
  }
}

// (G) DATABASE SETTINGS - CHANGE TO YOUR OWN!
define("DB_HOST", "localhost");
define("DB_NAME", "test");
define("DB_CHARSET", "utf8mb4");
define("DB_USER", "root");
define("DB_PASSWORD", "");

// (H) ADDRESS BOOK OBJECT
$_AB = new AddressBook();

3-ajax.php

<?php
if (isset($_POST["req"])) {
  require "2-lib.php";
  switch ($_POST["req"]) {
    // (A) GET ENTRY/ENTRIES
    case "get":
      echo json_encode($_AB->get(
        isset($_POST["id"]) ? $_POST["id"] : null
      ));
      break;

    // (B) SAVE ENTRY
    case "save":
      $_AB->save(
        $_POST["name"], $_POST["email"], $_POST["tel"], $_POST["addr"],
        isset($_POST["id"]) ? $_POST["id"] : null
      );
      echo "OK";
      break;

    // (C) DELETE ENTRY
    case "del":
      $_AB->del($_POST["id"]);
      echo "OK";
      break;
  }
}

4a-book.php

<!DOCTYPE html>
<html>
  <head>
    <title>Address Book</title>
    <script src="4b-book.js"></script>
    <link rel="stylesheet" href="4c-book.css">
  </head>
  <body>
    <!-- (A) ADDRESS BOOK LIST -->
    <div id="abWrap">
      <div id="abAdd" class="row" onclick="ab.tog(true)">+</div>
      <div id="abList"></div>
    </div>

    <!-- (B) ADDRESS BOOK ENTRY -->
    <form id="abForm" class="hide" onsubmit="return ab.save()">
      <label>Name</label>
      <input type="text" id="abName" required>
      <label>Email</label>
      <input type="email" id="abEmail" required>
      <label>Telephone</label>
      <input type="text" id="abTel" required>
      <label>Address</label>
      <textarea id="abAddr" required></textarea>
      <input type="hidden" id="abID">
      <input type="button" value="Back" onclick="ab.tog()">
      <input type="submit" value="Save">
    </form>
  </body>
</html>

4b-book.js

var ab = {
  // (A) HTML ELEMENTS
  hWrap : null, // address book list wrapper
  hList : null, // address book list
  hForm : null, // address book form
  hfName : null, // name field
  hfEmail : null, // email field
  hfTel : null, // tel field
  hfAddr : null, // address field
  hfID : null, // id field

  // (B) INIT - GET HTML ELEMENTS + LOAD LIST
  init : () => {
    ab.hWrap = document.getElementById("abWrap");
    ab.hList = document.getElementById("abList");
    ab.hForm = document.getElementById("abForm");
    ab.hfName = document.getElementById("abName");
    ab.hfEmail = document.getElementById("abEmail");
    ab.hfTel = document.getElementById("abTel");
    ab.hfAddr = document.getElementById("abAddr");
    ab.hfID = document.getElementById("abID");
    ab.list();
  },

  // (C) HELPER - AJAX FETCH
  ajax : (data, after) => {
    // (C1) FORM DATA
    let form = new FormData();
    for (let [k,v] of Object.entries(data)) { form.append(k,v); }

    // (C2) AJAX FETCH
    fetch("3-ajax.php", { method:"post", body:form })
    .then(res => res.text())
    .then(res => after(res))
    .catch(err => console.error(err));
  },

  // (D) TOGGLE HTML SECTION
  tog : id => {
    // (D1) ADD/EDIT ADDRESS BOOK ENTRY
    if (id)  {
      ab.hWrap.classList.add("hide");
      ab.hForm.classList.remove("hide");
      ab.hForm.reset();
      if (Number.isInteger(id)) {
        ab.ajax({ req : "get", id : id }, e => {
          e = JSON.parse(e);
          ab.hfName.value = e.name;
          ab.hfEmail.value = e.email;
          ab.hfTel.value = e.tel;
          ab.hfAddr.value = e.address;
          ab.hfID.value = id;
        });
      } else { ab.hfID.value = ""; }
    }

    // (D2) SHOW ADDRESS BOOK LIST
    else {
      ab.hForm.classList.add("hide");
      ab.hWrap.classList.remove("hide");
    }
  },

  // (E) LOAD ADDRESS BOOK LIST
  list : () => ab.ajax({ req : "get" }, entries => {
    ab.tog();
    entries = JSON.parse(entries);
    ab.hList.innerHTML = "";
    if (entries.length>0) { for (let e of entries) {
      let row = document.createElement("div");
      row.className = "row";
      row.innerHTML = `<div class="rInfo">
        <div class="rOne">${e.name}</div>
        <div class="rTwo">${e.email} | ${e.tel}</div>
        <div class="rTwo">${e.address}</div>
      </div>
      <button class="rBtn" onclick="ab.del(${e.id})">X</button>
      <button class="rBtn" onclick="ab.tog(${e.id})">&#9998;</button>`;
      ab.hList.appendChild(row);
    }}
  }),

  // (F) SAVE ADDRESS BOOK ENTRY
  save : () => {
    // (F1) FORM DATA
    let data = {
      req : "save",
      name : ab.hfName.value,
      email : ab.hfEmail.value,
      tel : ab.hfTel.value,
      addr : ab.hfAddr.value,
      id : ab.hfID.value
    };
    if (data.id=="") { delete data.id; }

    // (F2) AJAX SAVE
    ab.ajax(data, res => {
      if (res=="OK") { ab.list(); }
      else { alert(res); }
    });
    return false;
  },

  // (G) DELETE ADDRESS BOOK ENTRY
  del : id => { if (confirm("Delete entry?")) {
    ab.ajax({ req : "del", id : id }, res => {
      if (res=="OK") { ab.list(); }
      else { alert(res); }
    });
  }}
};
window.onload = ab.init;

4c-book.css

/* (A) WHOLE PAGE */
* {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
.hide { display: none !important; }
body {
  max-width: 400px;
  padding: 10px;
  margin: 0 auto;
  background: #f7f7f7;
}

/* (B) ADDRESS BOOK LIST */
.row {
  padding: 15px;
  margin-bottom: 10px;
  display: flex;
  align-items: stretch;
  border: 1px solid #efefef;
  background: #fff;
}
#abAdd {
  color: #5a6eb7;
  font-size: 30px;
  justify-content: center;
  cursor: pointer;
}
.rInfo {
  flex-grow: 1;
}
.rOne { font-weight: 700; }
.rTwo {
  margin-top: 5px;
  font-size: 14px;
  color: #333;
}
.rBtn {
  padding: 0 8px;
  font-size: 24px;
  border: 0;
  color: #5a6eb7;
  background: 0;
  cursor: pointer;
}

/* (C) ADDRESS BOOK ENTRY FORM */
#abForm {
  padding: 20px;
  border: 1px solid #ebebeb;
  background: #fff;
}
#abForm label, #abForm input[type=text], #abForm input[type=email], #abForm textarea {
  display: block;
  width: 100%;
}
#abForm label {
  color: #a5a5a5;
  margin: 10px 0;
}
#abForm label:first-child { margin-top: 0; }
#abForm input[type=text], #abForm input[type=email], #abForm textarea {
  padding: 10px;
  border: 1px solid #e1e1e1;
  resize: none;
}
#abForm input[type=button], #abForm input[type=submit] {
  margin-top: 20px;
  padding: 10px;
  border: 0;
  cursor: pointer;
  color: #fff;
  background: #5a6eb7;
}