制作uploded文件中获得随机名称不工作

Question

所以我想我的uploded文件，以获得在文件名的最后一个随机数，但rand（）函数不工作

$post_image = rand($_FILES['image']['name'],1,100); 
$image_tmp = rand($_FILES['image']['tmp_name'],1,100); 
move_uploaded_file($image_tmp,"../img/$post_image"); 
$insert_query = "insert into posts 
(post_title,post_date,post_author,post_image,post_keywords,post_content) values 
('$post_title','$post_date','$post_author','$post_image','$post_keywords','$post_content')"; 

我在做什么错误？

Answer 1

文件名可以是类似myimage.jpg

您需要延长前添加一个随机数，使用类似

$parts = pathinfo($_FILES['image']['name']); 
$filename = $parts['filename']; 
$extension = $parts['extension']; 

$post_image = $filename . rand(1, 100) . '.' . $extension; 

// image_tmp does not need a random number added. 
$image_tmp = $_FILES['image']['tmp_name'];