Add words similarity test

Should put the almost same words in the same counter

db.php

@@ -85,6 +85,19 @@ class DataBase
 		} else {
 			return false;
 		}
+		$stmt = $this->db->prepare("
+			SELECT *
+			FROM   words
+			WHERE  cloud_id = :cid;
+		");
+		$stmt->bindValue(':cid', $cloudId, PDO::PARAM_INT);
+		$stmt->execute();
+		while($data = $stmt->fetch()) {
+			if ($this->areWordsSimilar($data['word'], $word)) {
+				$word = $data['word'];
+				break;
+			}
+		}
 		$stmt = $this->db->prepare("
 			SELECT *
 			FROM   words
@@ -275,4 +288,13 @@ class DataBase
 		return false;
 	}
 
+	function areWordsSimilar(string $word1, string $word2)
+	{
+		$sim = similar_text($word1, $word2, $perc);
+		$sim_meta = similar_text(metaphone($word1), metaphone($word2), $perc_meta);
+		if ($perc >= 80 && $perc_meta >= 80) {
+			return true;
+		}
+		return false;
+	}
 }