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‎README.md

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# PHP Quickstart
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This repository contains a simple web application that demonstrates how to quickly connect to and communicate with a [MariaDB](https://mariadb.com) database using [PHP](https://www.php.net/).
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<p align="center" spacing="10">
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<kbd>
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<img src="media/demo.gif" />
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</kbd>
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</p>
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## Getting Started
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The application in this repository demonstrates how to:
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* Connect to a MariaDB database using [mysqli](https://www.php.net/manual/en/book.mysqli.php)
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* Execute queries (`SELECT`, `UPDATE`, `INSERT` and `DELETE`) to manage _contact_ data (like a digital [rolodex](https://en.wikipedia.org/wiki/Rolodex))
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* Use prepared statements
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### Prepare the database
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The application relies on a single database (`rolodex`) that contains a single table (`contacts`). You can find the necessary SQL for setting up the environment in [schema.sql](schema.sql).
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### Run the application
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After you've [pulled down this repository](https://git-scm.com/docs/git-clone), follow these steps to get the app up and running:
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1. Update the database configuration settings in [config.php](src/config.php) (which is used across the app) to point to _your_ MariaDB database.
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_Example configuration:_
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```php
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$databaseHost = '127.0.0.1';
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$databaseUsername = 'user_name';
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$databasePassword = '********';
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$databaseName = 'rolodex';
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```
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**Note:** Check out the [config_skysql.php](config_skysql.php) file for an example of how to connect to [MariaDB SkySQL](https://mariadb.com/skyview).
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2. Run the application using the [built-in web server](https://www.php.net/manual/en/features.commandline.webserver.php).
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```bash
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$ php -S localhost:5000
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```
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## Helpful Resources
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* [MariaDB Quickstart](https://github.com/mariadb-developers/mariadb-getting-started)
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* [Official MariaDB Documentation](https://mariadb.com/docs)
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## Support and Contribution
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Please feel free to submit PR's, issues or requests to this project directly.
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If you have any other questions, comments, or looking for more information on MariaDB please check out:
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* [MariaDB Developer Hub](https://mariadb.com/developers)
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* [MariaDB Community Slack](https://r.mariadb.com/join-community-slack)
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Or reach out to us directly via:
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* [[email protected]](mailto:[email protected])
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* [MariaDB Twitter](https://twitter.com/mariadb)
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## License <a name="license"></a>
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[![License](https://img.shields.io/badge/License-MIT-blue.svg?style=plastic)](https://opensource.org/licenses/MIT)

‎media/demo.gif

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‎schema.sql

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CREATE DATABASE `rolodex`;
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CREATE TABLE `rolodex`.`contacts` (
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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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);

‎src/add.php

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<?php
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// Include database connection file
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include_once("config.php");
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if(isset($_POST['update']))
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{
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// Retrieve record values
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$name = mysqli_real_escape_string($mysqli, $_POST['name']);
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$age = mysqli_real_escape_string($mysqli, $_POST['age']);
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$email = mysqli_real_escape_string($mysqli, $_POST['email']);
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$nameErr = $ageErr = $emailErr = "";
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// Check for empty fields
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if(empty($name) || empty($age) || empty($email)) {
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if(empty($name)) {
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$nameErr = "* required";
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}
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if(empty($age)) {
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$ageErr = "* required";
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}
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if(empty($email)) {
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$emailErr = "* required";
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}
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} else {
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// Insert new contact
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$stmt = $mysqli->prepare("INSERT INTO contacts (name,age,email) VALUES(?, ?, ?)");
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$stmt->bind_param("sis", $name, $age, $email);
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$stmt->execute();
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// Redirect to home page (index.php)
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header("Location: index.php");
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}
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}
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else if (isset($_POST['cancel'])) {
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// Redirect to home page (index.php)
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header("Location: index.php");
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}
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?>
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<html>
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<head>
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<title>Edit Contact</title>
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<link rel="stylesheet" href="styles.css" />
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</head>
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<body>
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<form name="form1" method="post" action="add.php">
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<table>
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<tr>
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<td>Name</td>
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<td>
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<input type="text" name="name" value="<?php echo $name;?>">
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<span class="error"><?php echo $nameErr;?></span>
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</td>
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</tr>
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<tr>
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<td>Age</td>
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<td>
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<input type="text" name="age" value="<?php echo $age;?>">
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<span class="error"><?php echo $ageErr;?></span>
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</td>
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</tr>
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<tr>
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<td>Email</td>
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<td>
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<input type="text" name="email" value="<?php echo $email;?>">
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<span class="error"><?php echo $emailErr;?></span>
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</td>
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</tr>
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<tr>
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<td>
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<input class="cancel" type="submit" name="cancel" value="Cancel">
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</td>
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<td>
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<input type="submit" name="update" value="Update">
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</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>

‎src/config.php

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<?php
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// Basic connection settings
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$databaseHost = '<host_address>';
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$databaseUsername = '<user_name>';
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$databasePassword = '******';
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$databaseName = 'rolodex';
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// Connect to the database
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$mysqli = mysqli_connect($databaseHost, $databaseUsername, $databasePassword, $databaseName);
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?>

‎src/config_skysql.php

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<?php
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// MariaDB SkySQL connection (example) settings
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$databaseHost = 'transactions-1.mdb0009999.db.skysql.net';
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$databasePort = '5002';
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$databaseUsername = '*********';
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$databasePassword = 'ywjBYqdc%BlGAi6Dr]9SbebPZ';
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$databaseName = 'rolodex';
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$ssl_pem = "/path/to/skysql_chain.pem";
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$mysqli = mysqli_init();
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if (!$mysqli) {
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die('mysqli_init failed');
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}
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mysqli_options($mysqli, MYSQLI_OPT_SSL_VERIFY_SERVER_CERT, false);
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// THESE ARE FROM THE MYSQL SERVER.
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$mysqli->ssl_set(
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null,
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null,
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$ssl_pem,
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null,
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null
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);
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if (!$mysqli->real_connect($databaseHost, $databaseUsername, $databasePassword, $databaseName, $databasePort, null, MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT)) {
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die('Connect Error (' . mysqli_connect_errno() . ') '
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. mysqli_connect_error());
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}
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?>

‎src/delete.php

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<?php
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// Include database connection file
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include("config.php");
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// Retrieve [id] value from querystring parameter
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$id = $_GET['id'];
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// Delete row for a specified [id]
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$result = mysqli_query($mysqli, "DELETE FROM contacts WHERE id=$id");
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// Redirect to home page (index.php)
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header("Location:index.php");
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?>

‎src/edit.php

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<?php
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// Include database connection file
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include_once("config.php");
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if(isset($_POST['update']))
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{
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// Retrieve record values
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$id = mysqli_real_escape_string($mysqli, $_POST['id']);
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$name = mysqli_real_escape_string($mysqli, $_POST['name']);
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$age = mysqli_real_escape_string($mysqli, $_POST['age']);
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$email = mysqli_real_escape_string($mysqli, $_POST['email']);
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$nameErr = $ageErr = $emailErr = "";
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// Check for empty fields
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if(empty($name) || empty($age) || empty($email)) {
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if(empty($name)) {
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$nameErr = "* required";
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}
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if(empty($age)) {
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$ageErr = "* required";
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}
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if(empty($email)) {
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$emailErr = "* required";
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}
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} else {
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// Execute UPDATE
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$result = mysqli_query($mysqli, "UPDATE contacts SET name='$name',age='$age',email='$email' WHERE id=$id");
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$stmt = $mysqli->prepare("UPDATE contacts SET name=?, age=?, email=? WHERE id=?");
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$stmt->bind_param("sisi", $name, $age, $email, $id);
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$stmt->execute();
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// Redirect to home page (index.php)
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header("Location: index.php");
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}
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}
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else if (isset($_POST['cancel'])) {
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// Redirect to home page (index.php)
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header("Location: index.php");
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}
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?>
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<?php
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// Retrieve id value from querystring parameter
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$id = $_GET['id'];
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// Get contact by id
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$result = mysqli_query($mysqli, "SELECT * FROM contacts WHERE id=$id");
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if (!$result) {
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printf("Error: %s\n", mysqli_error($mysqli));
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exit();
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}
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else {
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while($res = mysqli_fetch_array($result))
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{
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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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?>
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<html>
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<head>
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<title>Edit Contact</title>
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<link rel="stylesheet" href="styles.css" />
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</head>
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<body>
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<form name="form1" method="post" action="edit.php?id=<?php echo $id ?>">
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<table>
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<tr>
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<td>Name</td>
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<td>
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<input type="text" name="name" value="<?php echo $name;?>">
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<span class="error"><?php echo $nameErr;?></span>
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</td>
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</tr>
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<tr>
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<td>Age</td>
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<td>
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<input type="text" name="age" value="<?php echo $age;?>">
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<span class="error"><?php echo $ageErr;?></span>
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</td>
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</tr>
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<tr>
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<td>Email</td>
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<td>
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<input type="text" name="email" value="<?php echo $email;?>">
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<span class="error"><?php echo $emailErr;?></span>
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</td>
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</tr>
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<tr>
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<td>
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<input class="cancel" type="submit" name="cancel" value="Cancel">
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</td>
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<td>
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<input type="submit" name="update" value="Update">
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<input type="hidden" name="id" value=<?php echo $_GET['id'];?>>
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</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>

‎src/index.php

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<?php
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// Include the database connection file
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include_once("config.php");
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// Fetch contacts (in descending order)
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$result = mysqli_query($mysqli, "SELECT * FROM contacts ORDER BY id DESC");
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?>
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<html>
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<head>
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<title>MariaDB Rolodex</title>
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<link rel="stylesheet" href="styles.css" />
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</head>
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<body>
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<table>
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<tr>
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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><a class="button" href="add.php">Add Contact</a></td>
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</tr>
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<?php
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// Print contacts
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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 this contact?')\">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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