变量未定义

Question

我遇到这个问题有些困难。当我尝试运行此代码时，会显示Notice: Undefined variable: errors in C:\xampp\htdocs\Bots\botanize.php on line 5和Warning: Invalid argument supplied for foreach() in C:\xampp\htdocs\Bots\botanize.php on line 5，但我不确定如何操作。我尝试了不同的方法，但他们不会工作。有什么想法吗？

 <?php 
$errors = array();
$error_num = 1;
function checkErrors(){
    foreach($errors as $e){
        if(count($errors)>0){
            echo "Error " . $error_num . ": " . $e . "<br />";
        }
        die();
    }
}
function curl_connection($website, $method, $data){
    if(strlen($website) < 1){
        array_push($errors, "The first parameter is not filled out!");
    }

    if(strlen($method) < 1){
        array_push($errors, "The second parameter is not filled out!");
    }

    if(strlen($data) < 1){
        array_push($errors, "The third parameter is not filled out!");
    }

    if(is_array($data)){
        array_push($errors, "The third parameter needs an array. Not a variable.");
    }

    if($method != 'POST' || $method != 'GET'){
        array_push($errors, "The second parameter needs a method type of POST or GET. Make sure the POST or GET is all capitalized.");
    }
}

checkErrors();

?>