personal-website/docs/www/blog/index.php

<?php
$COMMONS = $_SERVER['DOCUMENT_ROOT'] . "/../common";

include_once($COMMONS."/header.php");

/**
 * Display a blog-preview div
 */
function display_blog_preview($blogpost_id, $title, $abstract,
	$date_posted, $tags){
	printf("
<div class=\"blog-preview\">
	<a href=\"http://www.zdenekborovec-dev.cz/blog/article?guid=%s\">
		<h3>
			%s
		</h3>
	</a>
	<div class=\"blog-metadata\">
", $blogpost_id, $title);

	for($i = 0; $i < count($tags); $i++) {
		$tag = $tags[$i];
		printf("
		<span class=\"blog-tag\" style=\"background-color: %s\">
			%s
		</span>", $tag["color"], $tag["name"]);
	}

		printf("
		<span class=\"blog-publish-date\">
			Published on: %s
		</span>
	</div>
	<p>
		%s
	</p>
</div>
", date("Y-m-d", strtotime($date_posted)), $abstract);
}

/**
 * Select all the blogposts from the database, their tags, then display them.
 */
function display_blog_previews($conn){
	// Check DB connection
	if($conn == null){
		header($_SERVER["SERVER_PROTOCOL"]." 503 Service Unavailable", true, 503);
		include_once($_SERVER["DOCUMENT_ROOT"]."/errors/503.php");
		include_once($COMMONS."/footer.php");
		die();
	}

	// Prepare statement for selecting all the blogposts
	$stmt = $conn->prepare("SELECT blogpost_id, title, abstract, date_posted
		FROM blogposts ORDER BY date_posted DESC;");

	// Execute the statement
	$stmt->execute();

	// Fetch the blogposts
	$blogposts_arr = $stmt->fetchall(PDO::FETCH_ASSOC);

	// Prepare new statement for selecting the tags for a given blogpost
	$stmt = $conn->prepare("SELECT name, color FROM
		blogpost_tags INNER JOIN blogpost_has_tag ON
		blogpost_tags.tag_id = blogpost_has_tag.tag_id WHERE
		blogpost_id = :blogpost_id;");

	// Go through all the blogposts, fetch their tags and display them
	for($i = 0; $i < count($blogposts_arr); $i++) {
		// Get info for the current blog
		$blog = $blogposts_arr[$i];

		// Bind and execute the tag select
		$stmt->bindParam(":blogpost_id", $blog["blogpost_id"]);
		$stmt->execute();

		// Fetch the tags
		$tags_arr = $stmt->fetchall(PDO::FETCH_ASSOC);

		// Display the blog
		display_blog_preview($blog["blogpost_id"], $blog["title"],
			$blog["abstract"], $blog["date_posted"], $tags_arr);
	}
}

display_header("Blogs");
?>

<article>
	<h2>
		My blogposts
	</h2>
	<p>
		These can range from well thought out slow-burning blood-churning gems
		to random brain farts in textual form, you can use tags to filter.
	</p>
</article>
<hr>

<?php
display_blog_previews($conn);

include_once($COMMONS."/footer.php");
?>