233 lines
8.9 KiB
HTML
233 lines
8.9 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<!-- Always force latest IE rendering engine or request Chrome Frame -->
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<meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<!-- Use title if it's in the page YAML frontmatter -->
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<title>Use SQLite and PHP</title>
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<link href="/dashboard/stylesheets/normalize.css" rel="stylesheet" type="text/css" /><link href="/dashboard/stylesheets/all.css" rel="stylesheet" type="text/css" />
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<link href="//cdnjs.cloudflare.com/ajax/libs/font-awesome/3.1.0/css/font-awesome.min.css" rel="stylesheet" type="text/css" />
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<script src="/dashboard/javascripts/modernizr.js" type="text/javascript"></script>
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<link href="/dashboard/images/favicon.png" rel="icon" type="image/png" />
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</head>
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<body class="docs docs_use-sqlite">
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<div id="fb-root"></div>
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<script>(function(d, s, id) {
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var js, fjs = d.getElementsByTagName(s)[0];
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if (d.getElementById(id)) return;
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js = d.createElement(s); js.id = id;
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js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=277385395761685";
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fjs.parentNode.insertBefore(js, fjs);
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}(document, 'script', 'facebook-jssdk'));</script>
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<header class="header contain-to-grid">
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<nav class="top-bar" data-topbar>
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<ul class="title-area">
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<li class="name">
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<h1><a href="/dashboard/index.html">Apache Friends</a></h1>
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</li>
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<li class="toggle-topbar menu-icon">
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<a href="#">
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<span>Menu</span>
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</a>
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</li>
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</ul>
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<section class="top-bar-section">
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<!-- Left Nav Section -->
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<ul class="left">
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<li class="item "><a href="/dashboard/faq.html">FAQs</a></li>
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<li class="item active"><a href="/dashboard/howto.html">HOW-TO Guides</a></li>
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<li class="item "><a target="_blank" href="/dashboard/phpinfo.php">PHPInfo</a></li>
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<li class="item "><a href="/phpmyadmin/">phpMyAdmin</a></li>
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</ul>
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</section>
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</nav>
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</header>
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<div class="wrapper">
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<div class="hero">
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<div class="row">
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<div class="large-12 columns">
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<h1>Documentation</h1>
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</div>
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</div>
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</div>
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<div class="row">
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<div class="large-12 columns">
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<ul class="sub-nav">
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<li>
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<a class="pdf" target="_blank" href="/dashboard/docs/use-sqlite.pdf"> Download PDF
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<span>use-sqlite.pdf</span>
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</a> </li>
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</ul>
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<article class="asciidoctor">
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<h1>Use SQLite and PHP</h1>
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<div class="paragraph">
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<p>XAMPP comes with built-in support for SQLite, making it easy to get started building database-powered applications with PHP. This guide will walk you through the process of creating and populating a new SQLite database using XAMPP, then accessing the data within it using PHP.</p>
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</div>
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<div class="paragraph">
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<p>Begin by creating and populating a new database using the SQLite command-line client, as below:</p>
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</div>
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<div class="olist arabic">
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<ol class="arabic">
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<li>
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<p>Open your Windows command prompt by clicking the “Shell” button in the XAMPP control panel.</p>
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</li>
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<li>
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<p>Change to the <em>htdocs\</em> subdirectory of your XAMPP installation directory (typically <em>C:\xampp</em>) and create a new SQLite database file named <em>mydb.sq3</em> with the SQLite command-line client:</p>
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<div class="literalblock">
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<div class="content">
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<pre>cd C:\xampp\htdocs
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sqlite3 mydb.sq3</pre>
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</div>
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</div>
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<div class="paragraph">
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<p>You should now see an SQLite prompt, as below:</p>
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</div>
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<div class="imageblock">
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<div class="content">
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<img src="./images/use-sqlite/image1.png" alt="image1">
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</div>
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</div>
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</li>
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<li>
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<p>At the <em>sqlite></em> prompt, create a new table to hold your data. In this example, the table is named items and it contains 3 columns, for item ID, item name and item cost. You can use standard CREATE TABLE syntax to create the table, and you can <a href="http://www.sqlite.org/datatype3.html">learn more about SQLite’s built-in datatypes here</a>.</p>
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<div class="literalblock">
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<div class="content">
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<pre>CREATE TABLE items (id INTEGER PRIMARY KEY, name TEXT, price REAL);</pre>
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</div>
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</div>
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</li>
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<li>
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<p>Add some data to the new inventory table using INSERT commands, as shown below:</p>
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<div class="literalblock">
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<div class="content">
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<pre>INSERT INTO items VALUES ('1001', 'Salt', 3.15);
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INSERT INTO items VALUES ('1002', 'Pepper', 2.75);
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INSERT INTO items VALUES ('1003', 'Eggs', 2.00);
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INSERT INTO items VALUES ('1004', 'Bacon', 7.25);
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INSERT INTO items VALUES ('1005', 'Milk', 1.15);
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INSERT INTO items VALUES ('1006', 'Strawberries', 8.73);
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INSERT INTO items VALUES ('1007', 'Cereal', 2.65);</pre>
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</div>
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</div>
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</li>
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<li>
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<p>You can now also run a SELECT query on the data. For example, the query below returns all items that cost less than $3:</p>
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<div class="literalblock">
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<div class="content">
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<pre>SELECT * FROM items WHERE price < 3.00;</pre>
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</div>
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</div>
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<div class="imageblock">
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<div class="content">
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<img src="./images/use-sqlite/image2.png" alt="image2">
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</div>
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</div>
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</li>
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<li>
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<p>Once you’re done using the database, exit it by typing <em>.quit</em> at the <em>sqlite></em> prompt.</p>
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</li>
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</ol>
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</div>
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<div class="admonitionblock important">
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<table>
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<tr>
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<td class="icon">
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<i class="fa icon-important" title="Important"></i>
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</td>
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<td class="content">
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The database file (in this example, <em>mydb.sq3</em>) contains all your tables and data, so you should remember to back it up regularly.
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</td>
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</tr>
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</table>
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</div>
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<div class="paragraph">
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<p>The previous steps discussed how to create and use an SQLite database using the command-line client. However, more often than not, you’ll be using an SQLite database in combination with a PHP-powered Web application. XAMPP includes the PHP SQLite extension, so doing this is not very difficult at all.</p>
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</div>
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<div class="paragraph">
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<p>To connect to your SQLite database and execute queries on it with PHP, use your text editor to create an example script named <em>sqlite.php</em> in the <em>htdocs</em> subdirectory of your XAMPP installation directory and fill it with the following code:</p>
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</div>
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<div class="literalblock">
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<div class="content">
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<pre><?php
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$db = new SQLite3('mydb.sq3');
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$sql = "SELECT * FROM items WHERE price < 3.00";
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$result = $db->query($sql);
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while ($row = $result->fetchArray(SQLITE3_ASSOC)){
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echo $row['name'] . ': $' . $row['price'] . '<br/>';
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}
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unset($db);</pre>
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</div>
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</div>
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<div class="paragraph">
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<p>The first line of code creates a new SQLite3 object, using the <em>mydb.sq3</em> database file you created earlier. Then, the object’s <em>query()</em> method is used to execute a SELECT query on the database, and the result object’s <em>fetchArray()</em> method is used to iterate over the result set. Adding the SQLITE3_ASSOC parameter to the <em>fetchArray()</em> method tells PHP to return the results as an associative array, making it easy to access individual fields of the result set and display them on a Web page.</p>
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</div>
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<div class="paragraph">
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<p>Once done, save your changes and ensure that your Apache server is running. Then, browse to <a href="http://localhost/sqlite.php" class="bare">http://localhost/sqlite.php</a> to execute the script. You should see something like this:</p>
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</div>
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<div class="imageblock">
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<div class="content">
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<img src="./images/use-sqlite/image3.png" alt="image3">
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</div>
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</div>
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<div class="admonitionblock tip">
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<table>
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<tr>
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<td class="icon">
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<i class="fa icon-tip" title="Tip"></i>
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</td>
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<td class="content">
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To find out more about SQLite’s powerful features, <a href="http://sqlite.org/docs/">read the SQLite documentation</a>.
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</td>
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</tr>
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</table>
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</div>
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</article>
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<p class="footer_copyright">Copyright (c) 2022, Apache Friends</p>
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<li><a href="https://www.apachefriends.org/blog.html">Blog</a></li>
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