codeigniter - PHP Fatal error allowed memory size exhausted

I'm writing a codeigniter application, upon doing a query i get hit with the following fatal error.

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 262144 bytes) in /var/www/html/cryd/_zcore/core/Loader.php on line 262

I could increase the allowed memory size, but it seems that the issue could be much more graver, that if it is a memory leak, i'd just be giving php more memory to play around with. The query is not even that intensive, it just returns one row of data.

Here is my controller

    <?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Invest_webhook extends CI_Controller {


    private $web_msg = null;
    private $proceed = 1;
    private $data = null;
    private $receive = null;
    private $complete = 0;
    private $member = null;
    private function loadPage($page,$data=null){
        $data = array_merge($data,$this->lang->language);
        $this->parser->parse('dashboard/header',$data);
        $this->parser->parse('dashboard/'.$page);
        $this->parser->parse('dashboard/footer');
    }

    public function webhook(){
        echo memory_get_peak_usage()."<br/>";
        //$update = file_get_contents("php://input");
        //$update = json_decode($update,true);

        $update = array(
            'notification_id' => '57233292b6a3d133e9c83822',
            'delivery_attempt' => 1,
            'type' => 'address',
            'data' => Array(
                'network' => "BTCTEST",
                'address' => '2N1jfZt8Uc721FAWNjdVpQZjfTxeG271RKy',
                'balance_change' => 1.00000000,
                'amount_sent' => 0.00000000,
                'amount_received' => 1.00000000,
                'txid' => '',
                'confirmations' => 4,
                'is_green' => false
            ),
            'created_at' => 1497176944
        );

        $data = $this->get_investment_data($update['data']['address']);
        if(!$data){
            die('This address does not exist');
        }

        $this->data = $data[0];
        $this->member = $this->get_member_data($this->data['tid']);

        //Start the process to verify transaction and credit investment
        $this->verify_investment();
        $this->update_investment();

        //$parameter = $this->web_msg;
        //include APPPATH."libraries/telegrambotv2.php";
        //$bot = new Telegram('331263599:AAEpHNAdyN1X5TenBk_QkJdt7xfwzDI6YeQ','bot');

        echo $this->web_msg."<br/>";        
    }

    private function verify_investment(){
        include APPPATH."/libraries/BlockIo.php";
        $this->load->config('block');
        $block = new BlockIo($this->config->item('api_token'),$this->config->item('api_secret'));
        $address = ($this->data['address']);
        $receive = $block->get_address_balance(array('addresses' => $address));

        $receive = $receive->data->available_balance;


        $expect = $this->data['inv'];

        settype($receive,'float');
        settype($expect,'float');
        echo '<br/>'.$receive."<br/>".$expect."<br/>";
        if($receive == $expect){

            $this->receive = $receive;
            return true;
        }
        $this->proceed = 0;
        $this->web_msg = 'inv_mismatch';
        return false;
    }

    private function get_member_data($tid){
        $this->load->model('invest_model','invest');
        return $this->get_member_data($tid);
    }

    private function update_investment(){
        if(!$this->proceed){
            return;
        }
        $this->load->model('invest_model','invest');

        $einv = $this->member['inv'];


        settype($einv,'float');

        $new_inv = $einv + $this->receive;
        $this->member['inv'] = $new_inv;
        $this->member['last_inv'] = 'NOW()';
        $this->data['confirmed'] = 1;

        if($this->invest->update_investment($this->data,$this->member)){
            $this->web_msg = 'inv_complete';
            $this->complete = 1;
            return true;
        } else {
            $this->proceed = 0;
            $this->web_msg = 'inv_unx_err';
            return false;
        }
    }

    private function get_investment_data($address){
        $this->load->model('invest_model','invest');
        return $this->invest->investment_data($address);
    }

    private function log($text){
        $file = fopen(APPPATH."/logs/investments/log.log",'a');
        fwrite($file,$text);
        fwrite($file,"\n");
        fclose($file);
    }
}
Copy code

and here is my model

    <?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Invest_model extends CI_Model {
    public function __construct(){
        parent::__construct();
    }

    public function investment_data($address){
        $this->db->where('address',$address);
        $this->db->where('confirmed',0);
        $f = $this->db->get('investments');
        return $f->result_array();
    }

    public function current_investment($tid){
        $this->db->select('inv');
        $this->db->where('tid',$tid);
        $f = $this->db->get('users');
        $f = $f->row_array();
        return $f;
    }

    public function get_member_data($tid){
        echo "<hr/>";
        echo memory_get_peak_usage()."<br/>";
        $this->db->where('tid',$tid);
        echo memory_get_peak_usage()."<br/>";
        $f = $this->db->get('users');
        echo memory_get_peak_usage()."<br/>";
        return $f->row_array();
    }

    public function update_investment($inv,$member){
        $this->db->trans_begin();
        $this->db->set($inv);
        $this->db->where('address',$inv['address']);
        $this->db->update('investments');
        $this->db->set($member);
        $this->db->where('tid',$member['tid']);
        $this->db->update('users');
        if($this->db->trans_status() === FALSE){
            $this->db->trans_rollback();
            return false;
        } else {
            $this->db->trans_commit();
            return true;
        }
    }

}
Copy code

I am not as to where i can optimize this further, its pretty simple and straight forward, if its a problem in my logical appraoch, hopefully a better mind than mine will be able to spot and guide me further.

Thanks in advance.