Add class CI SEO Onpage

Author: hungnguyenhp

system/libraries/Seo_onpage.php

@@ -0,0 +1,124 @@
+<?php
+/**
+ * Project codeigniter-framework
+ * Created by PhpStorm
+ * User: 713uk13m <dev@nguyenanhung.com>
+ * Copyright: 713uk13m <dev@nguyenanhung.com>
+ * Date: 10/03/2023
+ * Time: 14:51
+ */
+defined('BASEPATH') or exit('No direct script access allowed');
+
+/**
+ * Class CI_Seo_onpage
+ *
+ * @author    713uk13m <dev@nguyenanhung.com>
+ * @copyright 713uk13m <dev@nguyenanhung.com>
+ */
+class CI_Seo_onpage
+{
+	protected $CI;
+
+	public function __construct()
+	{
+		$this->CI =& get_instance();
+		$this->CI->load->helper('url');
+	}
+
+	public function set_tags($title = "", $description = "", $image = "")
+	{
+		$current_url = current_url();
+		echo "<meta property='og:url' content='$current_url' />\n";
+
+		$this->set_title_tags($title);
+		$this->set_description_tags($description);
+		$this->set_image_tags($image);
+		$this->set_twitter_tags();
+		$this->set_facebook_tags();
+		$this->set_canonical();
+	}
+
+	private function set_title_tags($title)
+	{
+		if ($title !== "") {
+			echo "<title>$title</title>\n";
+			echo "<meta property='og:title' content='$title' />\n";
+			echo "<meta name='twitter:title' content='$title' />\n";
+		} elseif ($this->CI->config->item('site_title') !== "") {
+			echo "<title>" . $this->CI->config->item('site_title') . "</title>\n";
+			echo "<meta property='og:title' content='" . $this->CI->config->item('site_title') . "' />\n";
+			echo "<meta property='og:site_name' content='" . $this->CI->config->item('site_title') . "' />\n";
+			echo "<meta name='twitter:title' content='" . $this->CI->config->item('site_title') . "' />\n";
+		}
+
+	}
+
+	private function set_description_tags($description)
+	{
+		if ($description !== "") {
+			echo "<meta name='description' content='$description'/>\n";
+			echo "<meta property='og:description' content='$description' />\n";
+			echo "<meta name='twitter:description' content='$description' />\n";
+		} elseif ($this->CI->config->item('site_description') !== "") {
+			echo "<meta name='description' content='" . $this->CI->config->item('site_description') . "'/>\n";
+			echo "<meta property='og:description' content='" . $this->CI->config->item('site_description') . "' />\n";
+			echo "<meta name='twitter:description' content='" . $this->CI->config->item('site_description') . "' />\n";
+		}
+	}
+
+	private function set_image_tags($image)
+	{
+		$image_path = null;
+
+		if ($image !== "") {
+			$image_path = $this->format_image_tags($image);
+		} elseif ($this->CI->config->item('site_image') !== "") {
+			$image_path = $this->format_image_tags($this->CI->config->item('site_image'));
+		}
+
+		if ($image_path) {
+			list($width, $height) = getimagesize($image_path);
+			echo "<meta property='og:image' content='$image_path' />\n";
+			echo "<meta property='og:image:secure_url' content='$image_path' />\n";
+			echo "<meta name='twitter:image' content='$image_path' />\n";
+			echo "<meta name='twitter:card' content='summary_large_image' />\n";
+			echo "<meta property='og:image:width' content='$width' />\n<meta property='og:image:height' content='$height' />\n";
+		}
+	}
+
+	private function set_twitter_tags()
+	{
+		if ($this->CI->config->item('twitter_user') !== "") {
+			echo "<meta name='twitter:site' content='" . $this->CI->config->item('twitter_user') . "' />\n";
+		}
+	}
+
+	private function set_facebook_tags()
+	{
+		if ($this->CI->config->item('fb_page_id') !== "") {
+			echo "<meta property='fb:pages' content='" . $this->CI->config->item('fb_page_id') . "' />\n";
+		}
+
+		if ($this->CI->config->item('fb_app_id') !== "") {
+			echo "<meta property='fb:app_id' content='" . $this->CI->config->item('fb_app_id') . "' />\n";
+		}
+	}
+
+	private function set_canonical()
+	{
+		if ($this->CI->config->item('canonical_url') !== "") {
+			echo "<link rel='canonical' href='" . $this->CI->config->item('canonical_url') . "' />\n";
+		}
+	}
+
+	private function format_image_tags($image_path)
+	{
+		$path = parse_url($image_path);
+
+		if ($path['scheme'] === "http" || $path['scheme'] === "https") {
+			return $image_path;
+		}
+
+		return base_url($image_path);
+	}
+}