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chapagainchapagain
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‎add.html

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<html>
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<head>
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<title>Add Data</title>
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<script type="text/javascript">
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function validate() {
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if (document.form1.name.value == '') {
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alert('Please provide your name');
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document.form1.name.focus();
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return false;
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}
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if (document.form1.email.value == '') {
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alert('Please provide your email');
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document.form1.email.focus();
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return false;
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}
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return true;
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}
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</script>
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</head>
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<body>
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<a href="index.php">Home</a>
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<br/><br/>
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<div id="msg"></div>
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<!--<form action="add.php" method="post" name="form1" onsubmit = "return(validate());">-->
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<form action="add.php" method="post" name="form1" >
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<table width="25%" border="0">
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<tr>
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<td>Name</td>
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<td><input type="text" name="name"></td>
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</tr>
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<tr>
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<td>Age</td>
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<td><input type="text" name="age"></td>
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</tr>
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<tr>
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<td>Email</td>
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<td><input type="text" name="email"></td>
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</tr>
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<tr>
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<td></td>
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<td><input type="submit" name="Submit" value="Add"></td>
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</tr>
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</table>
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</form>
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</body>
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</html>
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‎add.php

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<html>
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<head>
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<title>Add Data</title>
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</head>
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<body>
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<?php
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//including the database connection file
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include_once("classes/Crud.php");
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include_once("classes/Validation.php");
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$crud = new Crud();
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$validation = new Validation();
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if(isset($_POST['Submit'])) {
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$name = $_POST['name'];
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$age = $_POST['age'];
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$email = $_POST['email'];
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$msg = $validation->check_empty($_POST, array('name', 'age', 'email'));
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$check_age = $validation->is_age_valid($_POST['age']);
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$check_email = $validation->is_email_valid($_POST['email']);
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// checking empty fields
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if($msg != null) {
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echo $msg;
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//link to the previous page
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echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
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} elseif (!$check_age) {
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echo 'Please provide proper age.';
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} elseif (!$check_email) {
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echo 'Please provide proper email.';
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}
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else {
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// if all the fields are filled (not empty)
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//insert data to database
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$result = $crud->execute("INSERT INTO users(name,age,email) VALUES('$name','$age','$email')");
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//display success message
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echo "<font color='green'>Data added successfully.";
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echo "<br/><a href='index.php'>View Result</a>";
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}
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}
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?>
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</body>
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</html>

‎classes/Crud.php

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<?php
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include_once 'DbConfig.php';
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class Crud extends DbConfig
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{
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public function __construct()
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{
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parent::__construct();
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}
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public function getData($query)
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{
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$result = $this->connection->query($query);
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if ($result == false) {
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return false;
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}
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$rows = array();
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while ($row = $result->fetch_assoc()) {
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$rows[] = $row;
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}
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return $rows;
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}
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public function execute($query)
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{
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$result = $this->connection->query($query);
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if ($result == false) {
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echo 'Error: cannot execute the command';
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return false;
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} else {
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return true;
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}
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}
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public function delete($id, $table)
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{
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$query = "DELETE FROM $table WHERE id = $id";
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$result = $this->connection->query($query);
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if ($result == false) {
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echo 'Error: cannot delete id ' . $id . ' from table ' . $table;
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return false;
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} else {
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return true;
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}
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}
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}
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?>

‎classes/DbConfig.php

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<?php
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class DbConfig
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{
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private $_host = 'localhost';
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private $_username = 'root';
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private $_password = 'root';
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private $_database = 'test';
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protected $connection;
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public function __construct()
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{
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if (!isset($this->connection)) {
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$this->connection = new mysqli($this->_host, $this->_username, $this->_password, $this->_database);
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if (!$this->connection) {
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echo 'Cannot connect to database server';
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exit;
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}
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}
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return $this->connection;
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}
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}
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?>

‎classes/Validation.php

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<?php
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class Validation
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{
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public function check_empty($data, $fields)
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{
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$msg = null;
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foreach ($fields as $value) {
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if (empty($data[$value])) {
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$msg .= "$value field empty <br />";
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}
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}
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return $msg;
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}
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public function is_age_valid($age)
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{
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//if (is_numeric($age)) {
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if (preg_match("/^[0-9]+$/", $age)) {
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return true;
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}
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return false;
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}
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public function is_email_valid($email)
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{
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//if (preg_match("/^[_a-z0-9-+]+(\.[_a-z0-9-+]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/", $email)) {
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if (filter_var($email, FILTER_VALIDATE_EMAIL)) {
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return true;
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}
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return false;
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}
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}
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?>

‎config.php

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<?php
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/*
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// mysql_connect("database-host", "username", "password")
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$conn = mysql_connect("localhost","root","root")
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or die("cannot connected");
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// mysql_select_db("database-name", "connection-link-identifier")
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@mysql_select_db("test",$conn);
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*/
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$mysqli = mysqli_connect("localhost", "root", "root", "test");
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//$res = mysqli_query($mysqli, "SELECT 'Please, do not use ' AS _msg FROM DUAL");
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//$row = mysqli_fetch_assoc($res);
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?>

‎database.sql

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create database test;
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use test;
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CREATE TABLE `users` (
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`id` int(11) NOT NULL auto_increment,
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`name` varchar(100) NOT NULL,
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`age` int(3) NOT NULL,
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`email` varchar(100) NOT NULL,
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PRIMARY KEY (`id`)
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);

‎delete.php

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<?php
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//including the database connection file
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include_once("classes/Crud.php");
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$crud = new Crud();
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//getting id of the data from url
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$id = $_GET['id'];
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//deleting the row from table
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//$result = $crud->execute("DELETE FROM users WHERE id=$id");
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$result = $crud->delete($id, 'users');
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if ($result) {
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//redirecting to the display page (index.php in our case)
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header("Location:index.php");
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}
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?>
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‎edit.php

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<?php
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// including the database connection file
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include_once("classes/Crud.php");
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$crud = new Crud();
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//getting id from url
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$id = $_GET['id'];
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//selecting data associated with this particular id
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$result = $crud->getData("SELECT * FROM users WHERE id=$id");
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foreach ($result as $res) {
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$name = $res['name'];
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$age = $res['age'];
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$email = $res['email'];
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}
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?>
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<html>
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<head>
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<title>Edit Data</title>
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</head>
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<body>
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<a href="index.php">Home</a>
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<br/><br/>
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<form name="form1" method="post" action="editaction.php">
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<table border="0">
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<tr>
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<td>Name</td>
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<td><input type="text" name="name" value=<?php echo $name;?>></td>
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</tr>
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<tr>
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<td>Age</td>
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<td><input type="text" name="age" value=<?php echo $age;?>></td>
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</tr>
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<tr>
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<td>Email</td>
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<td><input type="text" name="email" value=<?php echo $email;?>></td>
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</tr>
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<tr>
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<td><input type="hidden" name="id" value=<?php echo $_GET['id'];?>></td>
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<td><input type="submit" name="update" value="Update"></td>
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</tr>
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</table>
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</form>
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</body>
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</html>

‎editaction.php

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<?php
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// including the database connection file
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include_once("classes/Crud.php");
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include_once("classes/Validation.php");
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$crud = new Crud();
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$validation = new Validation();
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if(isset($_POST['update']))
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{
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$id = $_POST['id'];
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$name=$_POST['name'];
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$age=$_POST['age'];
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$email=$_POST['email'];
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$msg = $validation->check_empty($_POST, array('name', 'age', 'email'));
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$check_age = $validation->is_age_valid($_POST['age']);
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$check_email = $validation->is_email_valid($_POST['email']);
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// checking empty fields
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if($msg) {
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echo $msg;
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//link to the previous page
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echo "<br/><a href='javascript:self.history.back();'>Go Back</a>";
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} elseif (!$check_age) {
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echo 'Please provide proper age.';
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} elseif (!$check_email) {
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echo 'Please provide proper email.';
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} else {
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//updating the table
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$result = $crud->execute("UPDATE users SET name='$name',age='$age',email='$email' WHERE id=$id");
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//redirectig to the display page. In our case, it is index.php
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header("Location: index.php");
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}
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}
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?>

‎index.php

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<?php
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//including the database connection file
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include_once("classes/Crud.php");
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$crud = new Crud();
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//fetching data in descending order (lastest entry first)
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$query = "SELECT * FROM users ORDER BY id DESC";
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$result = $crud->getData($query);
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//echo '<pre>'; print_r($result); exit;
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?>
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<html>
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<head>
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<title>Homepage</title>
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</head>
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<body>
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<a href="add.html">Add New Data</a><br/><br/>
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<table width='80%' border=0>
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<tr bgcolor='#CCCCCC'>
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<td>Name</td>
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<td>Age</td>
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<td>Email</td>
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<td>Update</td>
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</tr>
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<?php
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foreach ($result as $key => $res) {
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//while($res = mysqli_fetch_array($result)) {
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echo "<tr>";
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echo "<td>".$res['name']."</td>";
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echo "<td>".$res['age']."</td>";
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echo "<td>".$res['email']."</td>";
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echo "<td><a href=\"edit.php?id=$res[id]\">Edit</a> | <a href=\"delete.php?id=$res[id]\" onClick=\"return confirm('Are you sure you want to delete?')\">Delete</a></td>";
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}
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?>
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</table>
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</body>
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</html>

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