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Introduction to the $_GET command
Introduction to PHP15/16
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  • 1. Getting started programming in PHP
  • 2. What are commands and comments in PHP
  • 3. Introduction to PHP tags
  • 4. Concatenating files when they are included
  • 5. Assembling the product page
  • 6. Changing the site menu in PHP
  • 7. Changing the site footer in PHP
  • 8. What are variables in PHP
  • 9. Introduction to the debug console
  • 10. Adding PHP directly to the page markup
  • 11. Working with databases
  • 12. Adding images from the database
  • 13. The id variable
  • 14. Introduction to the $_GET command
  • 15. Completing the online store project
  • 16. Summary of “Introduction to PHP”
Summary of “Introduction to PHP”
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Completing the online store project

We have just one more step to complete! Then you can take a well deserved break! Only not for too long, because there are many more interesting assignments for you to complete.

In the previous step, we made sure that we were able to get data from the URL. Now all we have to do is substitute $_GET['product_id'] in the variable value $id. Thus, we get the product item number.

$id = $_GET['product_id'];

How can we check that our dynamic template is working? We can do this using one of two methods.

The simplest method is to change the value of the query parameter again in the address bar.

The second method is a little bit more protracted. We have a catalog in which each product has a link. It already contains the correct address with the correct parameters. Our web designers took care of this. Therefore, we can go to the catalog page and click on any link. The browser will go to the page for this product, and we will see the desired product.

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Files
  • product.php
<section class="intro"> <div class="container"> <h1 class="intro-title">Comfort and coziness in&nbsp;<b>your</b> apartment</h1> <p>A variety of home furnishings with delivery worldwide</p> </div> </section> <section class="popular-products"> <div class="container"> <h2 class="visually-hidden">Top sellers</h2> <ul class="products-list"> <li> <a class="product-card" href="product.php?product_id=1"> <h3>Mseyulida</h3> <p>floor lamp</p> <span class="price"><del>$289</del> $288</span> <img src="img/item-mseyulida.jpg" width="156" height="120" alt="&quot;Mseyulida&quot; floor lamp"> </a> </li> <li> <a class="product-card product-card-new" href="product.php?product_id=2"> <h3>Rmaeribi</h3> <p>three-seat sofa</p> <span class="price">$5870</span> <img src="img/item-rmaeribi.jpg" width="156" height="120" alt=" &quot;Rmaeribi&quot; three-seat sofa"> </a> </li> <li> <a class="product-card" href="product.php?product_id=3"> <h3>Bletub</h3> <p>ceiling chandelier</p> <span class="price">$1360</span> <img src="img/item-bletub.jpg" width="156" height="120" alt="&quot;Bletub&quot; ceiling chandelier"> </a> </li> </ul> </div> </section> <section class="features"> <div class="container"> <h2 class="features-title">What <b>sets</b> us apart from our competitors?</h2> <ul class="features-list"> <li class="feature-unique">Our unique products are&nbsp;unlike anything else on the market</li> <li class="feature-organic">We use only natural materials</li> <li class="feature-protected">Our furniture is resistant to cat teeth and claws</li> </ul> </div> </section>
<footer class="site-footer"> <div class="container"> <p class="copyright">© Muffin, 2019</p> <ul class="navigation-list"> <li><a href="catalog.php">Catalog</a></li> <li><a href="delivery.html">Delivery</a></li> <li><a href="contacts.html">Contact us</a></li> </ul> <ul class="social-list"> <li> <a class="social-link-twitter" href="https://twitter.com"> <span class="visually-hidden">Twitter</span> </a> </li> <li> <a class="social-link-instagram" href="https://instagram.com"> <span class="visually-hidden">Instagram</span> </a> </li> <li> <a class="social-link-facebook" href="https://facebook.com"> <span class="visually-hidden">Facebook</span> </a> </li> </ul> </div> </footer> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Online store for home furnishings</title> <link href="style.css" rel="stylesheet"> </head> <body> <header class="site-header"> <nav class="site-navigation"> <a class="logo-link" href="index.php"> <img src="img/logo-full.svg" width="62" height="17" alt="Gloevk store logo"> </a> <ul class="navigation-list"> <li><a href="catalog.php">Catalog</a></li> <li><a href="delivery.html">Delivery</a></li> <li><a href="contacts.html">Contact us</a></li> <li><a href="blog.html">Blog</a></li> </ul> </nav> </header>
<?php require('components/header.php'); require('components/company_info.php'); require('components/footer.php');
<?php require('components/header.php'); require('components/products_list.php'); require('components/footer.php'); ?>
<section class="catalog"> <div class="container"> <h1 class="catalog-title">Product catalog</h1> <ul class="products-list"> <li> <a class="product-card" href="product.php?product_id=1"> <h3>Mseyulida</h3> <p>floor lamp</p> <span class="price"><del>$289</del> $288</span> <img src="img/item-mseyulida.jpg" width="156" height="120" alt="&quot;Mseyulida&quot; floor lamp"> </a> </li> <li> <a class="product-card product-card-new" href="product.php?product_id=2"> <h3>Rmaeribi</h3> <p>three-seat sofa</p> <span class="price">$5870</span> <img src="img/item-rmaeribi.jpg" width="156" height="120" alt=" &quot;Rmaeribi&quot; three-seat sofa"> </a> </li> <li> <a class="product-card" href="product.php?product_id=3"> <h3>Bletub</h3> <p>ceiling chandelier</p> <span class="price">$1360</span> <img src="img/item-bletub.jpg" width="156" height="120" alt="Bletub ceiling chandelier"> </a> </li> <li> <a class="product-card" href="product.php?product_id=4"> <h3>Nnulm</h3> <p>desk</p> <span class="price">$6832</span> <img src="img/item-nnulm.jpg" width="156" height="120" alt="&quot;Nnulm&quot; computer desk"> </a> </li> <li> <a class="product-card" href="product.php?product_id=5"> <h3>Asusmer</h3> <p>hanging bed</p> <span class="price"><del>$21320</del>$19320</span> <img src="img/item-asusmer.jpg" width="156" height="120" alt="&quot;Asusmer&quot; hanging bed"> </a> </li> <li> <a class="product-card product-card-new" href="product.php?product_id=6"> <h3>Tre</h3> <p>furniture set</p> <span class="price">$32560</span> <img src="img/item-tre.jpg" width="156" height="120" alt="&quot;Tre&quot; furniture set"> </a> </li> </ul> </div> </section>
<?php require('products_db.php'); require('components/header.php'); $id = 1; $title = get_product_title($id); $img_url = get_img_url($id); require('components/product_info.php'); require('components/footer.php');
<section class="item"> <div class="container"> <h1 class="item-title"><?= $title ?></h1> <img src="<?= $img_url ?>" width="510" height="392" alt="<?= $title ?>"> </div> </section>
<?php function get_products() { return [ '1' => [ 'title' => 'Mseyulida lamp', 'url' => 'img/item-mseyulida.jpg', ], '2' => [ 'title' => 'Rmaeribi sofa', 'url' => 'img/item-rmaeribi.jpg', ], '3' => [ 'title' => 'Bletub chandelier', 'url' => 'img/item-bletub.jpg', ], '4' => [ 'title' => 'Nnulm desk', 'url' => 'img/item-nnulm.jpg', ], '5' => [ 'title' => 'Asusmer hanging bed', 'url' => 'img/item-asusmer.jpg', ], '6' => [ 'title' => 'Tre furniture set', 'url' => 'img/item-tre.jpg', ], '7' => [ 'title' => 'Granny style chandelier', 'url' => 'img/item-default-old-lamp.jpg', ], '8' => [ 'title' => 'Do lamp', 'url' => 'img/item-do.jpg', ], '9' => [ 'title' => 'Epeus typewriter', 'url' => 'img/item-epeus.jpg', ], '10' => [ 'title' => 'Blempere stickers', 'url' => 'img/item-blempere.jpg', ], '11' => [ 'title' => 'Tueta panel', 'url' => 'img/item-tueta.jpg', ], '12' => [ 'title' => 'Breirburi organizer', 'url' => 'img/item-breirberi.jpg', ], '13' => [ 'title' => 'Nmyao pillow', 'url' => 'img/item-nmyao.jpg', ], '14' => [ 'title' => 'Kel lamp', 'url' => 'img/item-kel.jpg', ], '15' => [ 'title' => 'Omase pillow', 'url' => 'img/item-omase.jpg', ], '16' => [ 'title' => 'Ormu basket', 'url' => 'img/item-ormu.jpg', ], '17' => [ 'title' => 'Pinas paperclips', 'url' => 'img/item-pinas.jpg', ], '18' => [ 'title' => 'Preum compact cassette', 'url' => 'img/item-preum.jpg', ], '19' => [ 'title' => 'Badeta armchair', 'url' => 'img/item-badeta.jpg', ], '20' => [ 'title' => 'Rmob souvenir', 'url' => 'img/item-rmob.jpg', ], '21' => [ 'title' => 'Tkuoko chandelier', 'url' => 'img/item-tkuoko.jpg', ], '22' => [ 'title' => 'Briatuo armchairs', 'url' => 'img/item-briatuo.jpg', ] ]; } function get_product_attribute($id, $attr) { $products = get_products(); $result = $products[$id][$attr] ?? null; return $result; } function get_product_title($id) { return get_product_attribute($id, 'title'); } function get_img_url($id) { return get_product_attribute($id, 'url'); }
.visually-hidden:not(:focus):not(:active), input[type="checkbox"].visually-hidden, input[type="radio"].visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; border: 0; padding: 0; white-space: nowrap; clip-path: inset(100%); clip: rect(0 0 0 0); overflow: hidden; } body { min-width: 550px; padding: 0; margin: 0; font-family: "Arial", "Helvetica", sans-serif; font-size: 13px; line-height: 18px; } a { text-decoration: none; color: inherit; } .container { width: 510px; padding: 0 20px; margin: 0 auto; } .site-navigation { display: flex; width: 510px; padding: 0 20px; margin: 0 auto; justify-content: space-between; } .site-header { position: relative; z-index: 2; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2); } .logo-link:hover, .logo-link:focus { opacity: 0.5; } .logo-link:active { opacity: 0.3; } .logo-link img { margin: 10px 0; } .navigation-list { display: flex; margin: 0 -15px 0 0; padding: 0; list-style: none; flex-wrap: wrap; justify-content: flex-end; } .navigation-list a:hover, .navigation-list a:focus { opacity: 0.5; } .navigation-list a:active { color: #ff8a00; } .navigation-list a { display: block; padding: 12px 15px 11px; color: #845927; } .intro .container { z-index: -1; min-height: 150px; margin-bottom: 20px; padding: 15px 0 0; box-sizing: border-box; background-image: url("img/index-background.jpg"); background-repeat: no-repeat; background-position: top right; } .intro-title { width: 240px; padding: 0; margin: 0; font-family: "Georgia", "Times", serif; font-size: 28px; line-height: 36px; font-weight: 400; } .intro-title b, .features-title b, .delivery-text b { font-weight: 400; color: #ff8a00; } .intro p { width: 210px; margin: 8px 0 10px; padding: 0; line-height: 20px; } .quote { display: block; position: relative; padding: 0 0 0 33px; margin: 20px 0 20px; font-family: "Georgia", "Times", serif; font-style: italic; } .quote p { padding: 0; margin: 0; font-size: 16px; line-height: 24px; quotes: none; } .quote::before { position: absolute; content: "«"; top: 0; left: 0; font-size: 36px; color: #ff8a00; } .author { display: block; padding: 0; margin: 4px 0; } .popular-products { margin: 0; background-color: #fff3e5; } .delivery, .custom, .contacts, .catalog, .item { margin: 15px 0 10px; } .delivery-title, .custom-title, .contacts-title, .catalog-title, .item-title { padding: 0; margin: 0; font-family: "Georgia", "Times", serif; font-size: 28px; line-height: 36px; font-weight: 400; } .custom-columns { display: flex; flex-grow: 0; } .custom-columns img { display: flex; flex-shrink: 0; align-items: center; margin: 20px 20px 30px 0; min-height: 200px; } .custom-columns div { margin: 5px 0 20px; } .products-list { display: flex; padding: 20px 0 0; margin: 0 0 0 -20px; flex-wrap: wrap; flex-shrink: 0; list-style: none; } .products-list li { display: flex; } .product-card { position: relative; display: flex; width: 132px; margin-bottom: 20px; margin-left: 20px; padding: 124px 12px 12px; flex-direction: column; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); } .product-card-new { position: relative; } .product-card-new::after { position: absolute; content: "new"; width: 34px; height: 15px; top: 8px; right: -2px; font-weight: 700; line-height: 14px; color: #ffffff; text-align: center; background-color: #ff8a00; border-radius: 4px 0 0 4px; } .product-card:hover, .product-card:focus { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3); } .product-card:active { box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1); } .product-card img { position: absolute; top: 0; left: 0; order: -1; } .product-card h3 { margin: 0 0 2px 0; padding: 0; font-family: "Georgia", "Times", serif; font-size: 15px; line-height: 18px; font-weight: 400; } .product-card p { margin: 0 0 8px 0; padding: 0; font-family: "Georgia", "Times", serif; font-style: italic; font-size: 13px; line-height: 16px; } .price { margin-top: auto; font-weight: 700; font-size: 15px; color: #ff8a00; } .price del { margin-right: 2px; font-weight: 400; font-size: 13px; color: #000000; text-decoration: line-through; } .map-link { display: block; margin-top: -20px; margin-bottom: 30px; color: #845927; } .map-link:hover, .map-link:focus { opacity: 0.5; } .map-link:active { color: #ff8a00; } .contacts img, .item img { display: flex; flex-shrink: 0; align-items: center; margin: 20px 0 30px; min-height: 200px; } .contacts-info { margin: -10px 0 30px; } .contacts-info p { position: relative; padding-left: 16px; margin: 12px 0; } .contact-phone::before { position: absolute; content: ""; width: 10px; height: 13px; top: 2px; left: 0; background-image: url("img/icon-phone.svg"); } .contact-address::before { position: absolute; content: ""; width: 9px; height: 13px; top: 2px; left: 0; background-image: url("img/icon-pin.svg"); } .delivery-background { display: flex; flex-shrink: 0; align-items: center; margin: 20px 0 30px; min-height: 200px; background-image: url("img/delivery-background.jpg"); background-repeat: no-repeat; background-position: center left; } .delivery-text { width: 210px; margin-left: auto; padding: 16px 20px 20px; background-color: #ffffff; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1); } .delivery-text p { margin: 8px; padding: 0; } .features { padding-top: 20px; padding-bottom: 10px; } .features-title, .services-title, .products-title { margin: 0; padding: 0; font-family: "Georgia", "Times", serif; font-size: 20px; line-height: 24px; font-weight: 400; } .features-list { display: flex; padding: 0; margin: 14px 0 0; justify-content: space-between; flex-wrap: wrap; list-style: none; } .features-list li { position: relative; width: 142px; margin-bottom: 10px; } .features-list li::before { position: absolute; content: ""; top: 2px; left: 0; } .feature-unique { padding-left: 22px; } .feature-unique::before { width: 16px; height: 12px; background-image: url("img/feature-unique.svg"); } .feature-organic { padding-left: 25px; } .feature-organic::before { width: 19px; height: 12px; background-image: url("img/feature-organic.svg"); } .feature-protected { padding-left: 16px; } .feature-protected::before { width: 10px; height: 12px; background-image: url("img/feature-protected.svg"); } .site-footer { background-color: #847462; } .site-footer .container { display: flex; flex-grow: 1; justify-content: space-between; } .copyright { margin: auto 0; flex-shrink: 0; color: #ffffff; } .site-footer .navigation-list { margin-right: 15px; margin-left: -15px; justify-content: left; } .copyright + .navigation-list { justify-content: center; margin-left: 15px; } .site-footer a { display: block; margin: 0; padding: 14px 15px; color: #ffffff; } .social-list { display: flex; width: 110px; padding: 0; margin: 0 -10px 2px; justify-content: end; flex-shrink: 0; flex-wrap: wrap; align-items: center; list-style: none; } .social-list a { display: block; width: 14px; height: 14px; padding: 10px; background-repeat: no-repeat; background-position: center; } .social-link-twitter { background-image: url("img/icon-twitter.svg"); } .social-link-instagram { background-image: url("img/icon-instagram.svg"); } .social-link-facebook { background-image: url("img/icon-facebook.svg"); } .social-list a:hover, .social-list a:focus { opacity: 0.5; } .social-list a:active { opacity: 0.3; } /* Additional styles for an alternate homepage */ .intro-alt { min-height: 145px; margin-bottom: 20px; color: #ffffff; background: linear-gradient(#ffad4c 0%, #ea9b3e 80%, #ffad4c 100%); } .intro-alt .container { display: flex; justify-content: space-between; } .intro-text { flex-shrink: 0; padding: 20px 0; } .intro-item { display: flex; flex-direction: column; align-items: center; position: relative; width: 272px; padding-top: 58px; flex-shrink: 0; } .intro-item img { position: absolute; top: 14px; right: 0; } .intro-item p { margin-bottom: 2px; z-index: 2; } .intro-alt .intro-title { margin: 0; padding: 0 0 4px; font-family: "Georgia", "Times", serif; font-size: 32px; line-height: 36px; font-weight: 700; } .intro-description { margin: 0; padding: 0 0 16px; font-size: 15px; font-weight: 700; } .intro-info { margin: 0; line-height: 22px; } .intro-alt code { display: inline-block; vertical-align: baseline; margin: 0 8px; padding: 1px 8px; font-family: inherit; color: #000000; font-weight: 700; letter-spacing: 0.5px; background-color: #ffffff; border-radius: 4px; } .intro-price { z-index: 2; font-size: 15px; font-weight: 700; } .intro-price del { margin-right: 2px; font-weight: 400; font-size: 13px; color: #000000; text-decoration: line-through; } .services-list { display: flex; padding: 0; margin: 14px 0 0; justify-content: space-between; flex-wrap: wrap; list-style: none; } .services-list li { position: relative; width: 156px; margin-bottom: 20px; padding: 122px 0 0; } .services-list li::before { position: absolute; content: ""; top: 0; left: 0; width: 156px; height: 114px; background-repeat: no-repeat; } .service-cleaning::before { background-image: url("img/service-cleaning.jpg"); } .service-placing::before { background-image: url("img/service-placing.jpg"); } .service-decorating::before { background-image: url("img/service-decorating.jpg"); } .products-title { padding-top: 20px; } .product-card-wide { position: relative; display: flex; flex-wrap: wrap; width: 100px; min-height: 81px; margin-bottom: 30px; margin-left: 20px; padding: 15px 25px 15px 120px; background-color: #ffffff; box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); } .product-card-wide p { margin-bottom: 10px; }
  • components/
    • company_info.php
    • footer.php
    • header.php
    • products_list.php
    • product_info.php
  • index.php
  • catalog.php
  • product.php
  • products_db.php
  • style.css
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<?php
require('products_db.php');
 
 
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    GoalsCompleted 0 out of 4
    1. Replace the value of the variable $id with $_GET['product_id'].
    2. In the address bar replace the number 1 with 9.
    3. Go to the catalog.php tab in the mini browser.
    4. Click on the third product (“Bletub”). Make sure that the selected product is displayed on the product page.

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