move_uploaded_file不起作用并返回false PHP

Question

2天我试图找出问题的原因。但是我根本找不到。它没有显示“DOESNT SHOW ME”，它返回else语句。它打印了很多信息。请忽略用户名，product_id，我正在测试这就是为什么我认为他们感谢你帮助谁

<?php
    include("config.php");
        if($conn)
        {
               $product_id = "39";
               $username = "admin";
               $input = $_POST['comment'];
               $subject = $_POST['subject'];
               $type = $_POST['type'];
               $path = "img/products/";
               $valid_formats = array("jpg", "png", "gif", "bmp","jpeg");
               $name = $_FILES['photoimg']['name'];
               $size = $_FILES['photoimg']['size'];

               if(strlen($name))
                    {
                    list($txt, $ext) = explode(".", $name);
                    if(in_array($ext,$valid_formats))
                        {
                        if($size<(1024*1024)) // Image size max 1 MB
                            {
                            $actual_image_name = time()."-".$username."-".$subject.".".$ext;
                            $tmp = $_FILES['photoimg']['tmp_name'];
                            $upload_like= $path.basename($actual_image_name);

                            $done = move_uploaded_file($tmp,$upload_like);
                            if($done){  
                                    echo "DOESNT SHOW ME :(";

                                    //$insert_image = "UPDATE post SET product_img = '$upload_like' WHERE username='$username' AND id='$product_id";
                                    //$run_image = $conn -> query($insert_image);

                                    $insert_sql = "INSERT INTO post (username,subject,user_post,time_added,type,product_img) VALUES ('$username','$subject','$post', CURRENT_TIMESTAMP , '$type','$upload_like')";
                                       $run_sql = $conn -> query($insert_sql);
                                       if($run_sql)
                                       {
                                            echo "DONE";
                                       }
                                       else
                                        {
                                            echo "Something crazy happened.OMG!";
                                        }

                                }
                            else
                                echo "failed". "<br>" . PHP_EOL;
                                echo "Actual Image Name: " .$actual_image_name . "<br>" . PHP_EOL;
                                echo "Path To: ".$path. "<br>" . PHP_EOL;
                                echo "Temp: " .$tmp. "<br>" . PHP_EOL;
                                echo "Last version: ".$upload_like. "<br>" . PHP_EOL;
                                echo "Subject: ".$subject. "<br>" . PHP_EOL;
                                echo "Message: ".$input. "<br>" . PHP_EOL;
                                echo "Type: ".$type. "<br>" . PHP_EOL;


                            }
                        else
                            echo "Image file size max 1 MB";
                        }
                    else
                        echo "Invalid file format..";
                    }
                else
                    echo "Please select image..!";



        }
    ?>