php check file name exist, rename the file

Question

How do I check if file name exists, rename the file?

for example, I upload a image 1086_002.jpg if the file exists, rename the file as 1086_0021.

Answer 1

You can change your if statement to a while loop:

$newpath = $fullpath;
while(file_exists($newpath)) {
    $newpieces = explode(".", $fullpath);
    $frontpath = str_replace('.'.end($newpieces),'',$fullpath);
    $newpath = $frontpath.'1.'.end($newpieces);
}

file_put_contents($newpath, file_get_contents($_POST['upload']));