ท่านใดเคยใช้ API หรือ library การตัดคำภาษาไทย PHP บ้างครับ

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;

namespace Trie
{
    public class TrieNode
    {
        public string RemainingKey = "";
        public string Value = null;
        public TrieNode[] Children = null;
        public ArrayList Grammar ;
       
        //Constructor
        public TrieNode() {
            Grammar = new ArrayList(); //HashTable or Joggle Array.
            Grammar.AddRange(new string[] {"ะ", "า", "อิ", "เ", "หี"});
        }

        // Add a value to this node's subtrie.
        public void AddValue(string newKey, string newValue)
        {
           int idx = 0;
        }

        // Find a value in this node's subtrie.
        public string FindValue(string targetKey)
        {
        }
       
       //*******Continue.
    }
}