function extract_keyword($content, $permalink)
{
// Set up the text to analyze keyword.
// If the length of the feed is not up to quality standards, track down and load the actual article.
if (strlen(strip_tags($content)) < 500) {
$extracted_text = $this->feed_hunter($permalink)->text;
// Make sure the newly loaded feed is up to quality standards.
if (strlen(strip_tags($content)) > 500) {
$specimen = $extracted_text;
} else {
$specimen = strip_tags($content);
}
} else {
$specimen = strip_tags($content);
}
$characters = array('"');
$replacements = array(' ');
$text = str_replace($characters, $replacements, $specimen);
// Load the AlchemyAPI and configure access key.
require_once 'inc/AlchemyAPI.php';
$alchemyObj = new AlchemyAPI();
$alchemyObj->setAPIKey("1414657c7c56cc31a067f8daafabf1d6978c28fe");
// Analyze the article, fetching the concept, keyword, and category of an article.
$tags_json = json_decode($alchemyObj->TextGetRankedKeywords($text, 'json'));
$concepts_json = json_decode($alchemyObj->TextGetRankedConcepts($text, 'json'));
$category = json_decode($alchemyObj->TextGetCategory($text, 'json'));
$this->feed_model->alchemy_meter(3);
// Parse the result retrieved from AlchemyAPI into an associated array.
$tags = array();
foreach ($concepts_json->concepts as $concept) {
$characters = array("'");
$replacements = array("");
$output = str_replace($characters, $replacements, $concept->text);
$tag['keyword'] = $output;
$tag['confidence'] = $concept->relevance;
$tag['is_concept'] = TRUE;
array_push($tags, $tag);
}
foreach ($tags_json->keywords as $keyword) {
$characters = array("'");
$replacements = array("");
$output = str_replace($characters, $replacements, $keyword->text);
$tag['keyword'] = $output;
$tag['confidence'] = $keyword->relevance;
$tag['is_concept'] = FALSE;
array_push($tags, $tag);
}
// Return the result.
$result['tags'] = $tags;
$result['category'] = $category->category;
return $result;
}
