Part of the code gets skipped - php

Question

I'm trying to write my own little blog.
For this, I use the CodeIgniter framework.
In my blog posts, I also want to save a category and some keywords.
I need to be able to check if a category/keyword already exists, if not a new one needs to be created.
The ID of the existing/new one is saved to be used in a 'connecting' table.
I have the following database setup.
posts - id (AI), title, date, content
categories - id (AI), category
post_categories - post, category
keywords - id (AI), keyword
post_keywords - post, keyword
*AI = Auto Increment
The tables posts, post_categories and post_keywords get updated, the tables categories and keywords remain empty. The category and keyword values in the connecting tables are ofc incorrect.
When troubleshooting my code, I echo'ed every variable in every step.
For some reason, the whole if/else structures checking whether a category or keyword already exists is skipped.
/**
* Insert post into database
* Check if category already exists, if not add it
* Check if keywords already exist, if not add them
* Insert post-category and post-keyword links
* #param array $data
* #return boolean success
*/
function create($data) {
print_r($data);
try {
// posts
$this->db->insert('posts', array(
'title' => $data['title'],
'date' => $data['date'],
'content' => $data['content']
));
$postId = $this->db->insert_id();
echo '<p>Inserted new post (' . $data['title'] . ') at ' . $postId . '</p>';
// category
$category = $data['category'];
$query = $this->db->get_where('categories', array('category' => $category));
$cat = 666;
if ($this->db->count_all_results() == 1) {
foreach ($query->result() as $row) {
$cat = $row->id;
echo '<p>cat = ' . $cat . '</p>';
}
} else {
$this->db->insert('categories', array(
'category' => $category
));
$cat = $this->db->insert_id();
echo '<p>cat = ' . $cat . '</p>';
}
echo '<p>Inserted new category (' . $category . ') at ' . $cat . '</p>';
if($cat == 666) { echo ':('; }
$this->db->insert('post_categories', array(
'post' => $postId,
'category' => $cat
));
// keywords
$keywords = $data['keywords'];
foreach ($keywords as $keyword) {
$query = $this->db->get_where('keywords', array('keyword' => $keyword));
$key = 666;
if ($this->db->count_all_results() == 1) {
foreach ($query->result() as $row) {
$key = $row->id;
echo '<p>key = ' . $key . '</p>';
}
} else {
$this->db->insert('keywords', array(
'keyword' => $keyword
));
$key = $this->db->insert_id();
echo '<p>key = ' . $key . '</p>';
}
echo '<p>Inserted new keyword (' . $keyword . ') at ' . $cat . '</p>';
if($key == 666) { echo ':('; }
$this->db->insert('post_keywords', array(
'post' => $postId,
'keyword' => $key
));
}
return true;
} catch (Exception $e) {
print '<p>ERROR:</p>' . $e;
return false;
}
}
Also in my controller
echo '<p>' . ($this->m_posts->create($post) ? 'no errors :)' : 'error! :(') . '</p>';
Result
Array ( [title] => Foo Bar [date] => 2014-05-22 [content] => lorum ipsum dolore si amet [category] => Category [keywords] => Array ( [0] => Some [1] => Keywords ) )
Inserted new post (Foo Bar) at 2
Inserted new category (Category) at 666
:(
Inserted new keyword (Some) at 666
:(
Inserted new keyword (Keywords) at 666
:(
no errors :)
In my database
POSTS
stdClass Object ( [id] => 1 [title] => Title [date] => 2014-05-22 [content] => okokokokokokok )
stdClass Object ( [id] => 2 [title] => Foo Bar [date] => 2014-05-22 [content] => lorum ipsum dolore si amet )
CATEGORIES
POST_CATEGORIES
stdClass Object ( [post] => 1 [category] => 666 )
stdClass Object ( [post] => 2 [category] => 666 )
KEYWORDS
POST_KEYWORDS
stdClass Object ( [post] => 1 [keyword] => 666 )
stdClass Object ( [post] => 2 [keyword] => 666 )
stdClass Object ( [post] => 2 [keyword] => 666 )
note: I use 99 as a temp value to test if the variable was filled because I first thought the variable's value didn't leave the scope of the if/else. But echo'ing the values of the vars inside the if/else prints nothing. It seems to skip the whole if/else sections.

Answer 1

Adjust the code to:
In if statement num_rows of query it self
If you expect 1 record do a $query->row() directly instead of a foreach loop.
$query = $this->db->get_where('categories', array('category' => $category));
$cat = 666;
if ($query->num_rows() == 1) {
$row = $query->row();
$cat = $row->id;
echo '<p>cat = ' . $cat . '</p>';
} else {
$this->db->insert('categories', array(
'category' => $category
));
$cat = $this->db->insert_id();
echo '<p>cat = ' . $cat . '</p>';
}