//do the edit in your javascript
$('.signinform').submit(function() { $(this).ajaxSubmit({ type : "POST", //set the data type dataType:'json', url: 'index.php/user/signin', // target element(s) to be updated with server response cache : false, //check this in Firefox browser success : function(response){ console.log(response); alert(response)}, error: onFailRegistered }); return false;
});
//controller function
public function signin() { $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5); //add the header here header('Content-Type: application/json'); echo json_encode( $arr );
}

{"tags":[{"tag":"textarea","content":"public function index()\n{\n\t$result_array = $this->CI->user_model->get_all();\n\t\n \t// return json response\n header('Content-Type: application/json');\n echo json_encode( $result_array );\n exit(); // to exit code execution\n}","code_language":"php"}]}