Undefined variable: error in adding field into db - php

Question

I'm getting error:Undefined variable: error
in my code:
public function add(){
$this->polls_model->rules = Pf::event()->trigger("filter","polls-adding-validation-rule",$this->polls_model->rules);
$template = null;
$template = Pf::event()->trigger("filter","polls-add-template",$template);
if ($this->request->is_post()){
$data = array();
$data["polls_question"] = $this->post->{"polls_question"};
$data["polls_pubdate"] = str_to_mysqldate($this->post->{"polls_pubdate"},$this->polls_model->elements_value["polls_pubdate"],"Y-m-d H:i:s");
$data["polls_unpubdate"] = str_to_mysqldate($this->post->{"polls_unpubdate"},$this->polls_model->elements_value["polls_unpubdate"],"Y-m-d H:i:s");
if (is_array($this->post->{"polls_status"})){
$data["polls_status"] = implode(",",$this->post->{"polls_status"});
}else{
$data["polls_status"] = $this->post->{"polls_status"};
}
$port_answer = isset($this->post->{"answer"}) ? $this->post->{"answer"} : array();
$data = Pf::event()->trigger("filter","polls-post-data",$data);
$data = Pf::event()->trigger("filter","polls-adding-post-data",$data);
$var = array();
$pollq_multiple_yes = intval($this->post->{'pollq_multiple_yes'});
$data['polls_multiple'] = 0;
if ($pollq_multiple_yes == 1) {
if(intval($this->post->{'pollq_multiple'}) > count($port_answer)){
$data['polls_multiple'] = 1;
}else{
$data['polls_multiple'] = intval($this->post->{'pollq_multiple'});
}
} else {
$data['polls_multiple'] = 1;
}
//debug($data);
Pf::database()->query('START TRANSACTION');
$inserted = $this->polls_model->insert($data);
if($inserted === false){
Pf::database()->query('ROLLBACK');
}else{
$new_id = $this->polls_model->insert_id();
$insert_meta = true;
if(count($port_answer) > 0){
$custom = array();
$int = count($port_answer);
for ($i = 0; $i < $int ; $i++) {
if(!empty($port_answer[$i])){
$custom = array(
'pollsa_qid' => $new_id,
'pollsa_answers' => e($port_answer[$i]),
);
}
$insert_meta = $this->answers_model->insert($custom);
}
if($insert_meta === false){
Pf::database()->query('ROLLBACK');
}else{
Pf::database()->query('COMMIT');
}
}
Pf::database()->query('COMMIT');
}
$errors = Pf::validator()->get_readable_errors(false);
foreach ($errors as $key => $value) {
$error[$key][0] = $errors[$key][0];
}
$this->view->errors = $error; // error here!
$var['content'] = $this->view->fetch($template);
if (count($error) > 0){// and here!!!
$var['error'] = 1;
}else{
Pf::event()->trigger("action","polls-add-successfully",$this->polls_model->insert_id(),$data);
$var['error'] = 0;
$var['url'] = admin_url($this->action.'=index&ajax=&id=&token=');
}
echo json_encode($var);
}else{
$this->view->render($template);
}
}
I edited code, added function code.
This is my add function, if I want add poll with answers.
It gives me this error to my log.
I found this tutorial Undefined Variable error in View
I've googled it but didnt find anything special what helps me out.

Answer 1

Initiate the variable as an array.
because if the $error is empty the compiler will see it as an array.
if not it will get an error.
$error = [];
$errors = Pf::validator()->get_readable_errors(false);
foreach ($errors as $key => $value) {
// $error[$key][0] = $errors[$key][0];
// the right way is below
// i actually dont know what you want to do but this is the right way
// but providing [0] will make it some how constant.
$error[$key] = $errors[$key]
}
$this->view->errors = $error; // error showing here!
$var['content'] = $this->view->fetch($template);
if (count($error) > 0){ // and here???
$var['error'] = 1;
}else{
Pf::event()->trigger("action","polls-add-successfully",$this->polls_model->insert_id(),$data);
$var['error'] = 0;
$var['url'] = admin_url($this->action.'=index&ajax=&id=&token=');
}