php - $_POST not work in codeingiter -

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my login form :

http://www.khabgahfeiz.ir/admin/login

in controller :

    public function handling() {          var_dump($_post['email']);         return; ....

but return null value , got error :

severity: notice  message: undefined index: email  filename: backend/login.php  line number: 29

use $this->input->post(). e.g.:

$this->input->post('table field'=>'form element name');

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