Can access detailed information through URL with function parameters (Codeigniter) - php

Question

I am creaiting my first Codeigniter application for a blog with news. In the main page there is only the title of the news which is also a link to a view with the detailed information and body of the news. Im having trouble on accessing the get through the URL that has to go over a function that receives the ID of the new as a parameter. I just can get that to work. Can someone help me?
The problem is not in the function itself because it works fine when i assig an static value to the URL, but for some reason i can send the $row->id object as a Get through the URL with the proper value for each of the news.
MODEL
class Post extends CI_Model{
public function getPost(){
$this->load->database('fintech_blog');
$data = $this->db->get('post');
return $data->$result();
}
CONTROLLER
public function getPost($id){
$query = $this->db->query("select * from post where id = '$id' ");
$rows = $query->result(); //method for putting into an array format
$data=array('result'=>$rows);
$this->load->view('view',$data);
}
VIEW
foreach ($result as $row):
$id = $row->id;
$post = site_url('welcome/getPost/$row->id');
?>
<!-- Main Content -->
<div class="container">
<div class="row">
<div class="col-lg-8 col-md-10 mx-auto">
<div class="post-preview">
<a href="<?php echo $post; ?>">
<h2 class="post-title">
<?php echo $row->title; ?>
</h2>
<h3 class="post-subtitle">
<?php echo $row->calling; ?>
</h3>
</a>
<p class="post-meta">Posted on
<!-- Start Bootstrap -->
<?php echo time_elapsed_string($row->created); ?></p>
</div>
<hr>
</div>
</div>
</div>
<?php endforeach; ?>

Answer 1

The problem comes from the way you create the string for $post.
As one commenter suggests the problem is the use of single quotes and to use double quotes instead. The most important feature of double-quoted strings is the fact that variable names will be expanded. Meaning the variable symbol ($test in this case) is replaced with the value of the variable.
To illustrate:
$test = "blue";
//first, a string created with single quotes
echo 'The sky is $test today.'; //outputs: The sky is $test today.
But using double quotes to create the string...
echo "The sky is $test today."; //outputs: The sky is blue today.
The var $test get expanded to the value it holds.
So, the first two lines of the foreach loop in the view should be.
$id = $row->id;
$post = site_url("welcome/getPost/$row->id");
However, you never use $id and you only use $post once. That says to me that these two lines are not needed. Delete them both.
Change the line
<a href="<?php echo $post; ?>">
to
<a href="<?php echo site_url("welcome/getPost/$row->id"); ?>">