PHP - Populate Select Tag Using SQLite3

Submitted by razormist on Wednesday, December 4, 2019 - 20:05.

In this tutorial we will create a Populate Select Tag using PHP. This code will add new options data to SQLite database when user submit the input fields. The code use PHP POST method to launch a specific function that add options to HTML select tag using SQLite INSERT query. This a free program, you can apply this to your system as your own. We will be using SQLite that provides an interface for accessing the database. It includes class interfaces to the SQL commands. And also it allows you to create SQL functions and aggregate using PHP.

Getting started:

First you have to download & install XAMPP or any local server that run PHP scripts. Here's the link for XAMPP server https://www.apachefriends.org/index.html. And, this is the link for the bootstrap that i used for the layout design https://getbootstrap.com/. Installing SQLite Browser We will now then install the SQLite data viewer, here's the link for the DB Browser for SQLite http://sqlitebrowser.org/.

Setting Up SQLite

First, we are going to enable SQLite 3 in our PHP.

Open localhost server folder XAMPP, etc and locate php.ini.
Open php.ini and enable sqlite3 by removing the semicolon in the line.
Save changes and Restart Server.

Creating the database connection

Open your any kind of text editor(notepad++, etc..). Then just copy/paste the code below then name it conn.php.

<?php
        $conn=new SQLite3('db/db_subject') or die("Unable to open database!");
        $query="CREATE TABLE IF NOT EXISTS `subject`(sub_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, subject TEXT)";
        
        $conn->exec($query);
?>

Creating The Interface

This is where we will create a simple form for our application. To create the forms simply copy and write it into you text editor, then save it as index.php.

<!DOCTYPE html>
<html lang="en">
        <head>
                <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1" />
                <link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
        </head>
<body>
        <nav class="navbar navbar-default">
                <div class="container-fluid">
                        <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
                </div>
        </nav>
        <div class="col-md-3"></div>
        <div class="col-md-6 well">
                <h3 class="text-primary">PHP - Populate Select Tag Using SQLite3</h3>
                <hr style="border-top:1px dotted #ccc;"/>
                <div class="col-md-4">
                        <form method="POST" action="add.php">
                                <div class="form-group">
                                        <label>Subject</label>
                                        <input type="text" class="form-control" name="subject" required="required"/>
                                </div>
                                <center><button class="btn btn-primary" name="add" >Add</button></center>
                        </form>
                </div>
                <div class="col-md-8">
                        <div class="form-group">
                                <select name="subject" class="form-control" required="required">
                                        <option value="">Select an option</option>
                                        <?php
                                                require'conn.php';
                                                
                                                $query=$conn->query("SELECT * FROM `subject`") or die("Failed to fetch row!");
                                                while($fetch=$query->fetchArray()){
                                                        echo"<option value='".$fetch['subject']."'>".$fetch['subject']."</option>";
                                                }
                                        ?>
                                </select>
                        </div>
                </div>
        </div>
</body> 
</html>

Creating the Main Function

This code contains the main function of the application. This code will add new options to select tag when the button is clicked. To do this just copy and write these block of codes as shown below inside the text editor, then save it as add.php.

<?php
        require_once'conn.php';
        if(ISSET($_POST['add'])){
                $subject=$_POST['subject'];
                
                $query="INSERT INTO `subject` (subject) VALUES('$subject')";
                
                $conn->exec($query);
                
                header("location:index.php");
        }
?>

There you have it we successfully created a Populate Select Tag using PHP. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!!!

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