PHP - Does A File Exist?

Hi everyone, I'm still learning, but getting intermediate in PHP now, but it is still challenge to learn. I'm trying to have php check to see if one file inside folder in server, seem I could not get it right, but I tested it on other site, it works, but not this script, I don't understand why it won't work...maybe logical is wrong?

here my code:

	if ($_POST['video']) {
	        $path1 = "UPLOADS/Home/";
        $path2 = "UPLOADS/Breakfast/";
        $path3 = "UPLOADS/Spider/";
	        $scan1 = scandir($path1);
        $scan2 = scandir($path2);
        $scan3 = scandir($path3);
	        $count1 = count($scan1) - 3;
        $count2 = count($scan2) - 3;
        $count3 = count($scan3) - 3;
	        if($count1 > 0) {
            header('location:exist.html');
        }elseif ($count2 > 0) {
            header('location:exist.html');
        }elseif ($count3 > 0) {
            header('location:exist.html');
        }
	

But other site, it works:

	$scan = scandir($path);
$count = count($scan) - 3;
	echo $count;
	if($count > 1){
    echo "Hello yourself!<br />";
}
	

Anyone will help will be appreciate! Thank you!

Gary

Edited April 3, 2019 by sigmahokies

I'm trying to do a simple image upload. It works fine on my local server but i'm moving all my files to my production server and some files i attempt to upload, via an html form, don't register. The $_FILES variable doesn't exist sometimes. I think its because of the file size but i'm not sure.

The form has two inputs: "title" and "userfile". I can put something in the title and attempt to upload a small excel file and both $_POST and $_FILES exist but if i do a larger image file both $_POST and $_FILES don't even get set.

I did an "echo ini_get('post_max_size');" and i get "8M". The image i'm attempting to upload is only 0.34M so i should be good there.

I've replaced the actual upload script with this, which is how i found out the variables only get set sometimes


Any suggestions would be much appreciated.
Code: [Select]
<?php
  echo "Upload: " . $_FILES["userfile"]["name"] . "<br />";
  echo "Type: " . $_FILES["userfile"]["type"] . "<br />";
  echo "Size: " . ($_FILES["userfile"]["size"] / 1024) . " Kb<br />";
  echo "Stored in: " . $_FILES["userfile"]["tmp_name"];

echo "<hr><pre>";
print_r($_POST);
echo "</pre><hr>";

echo "<pre>";
print_r($_FILES);
echo "</pre>";

I have a script that uses simplexml_load_file to download weather xml files.  It works great except when the file doesn't exist.  The server returns an HTML page when the xml file isn't available but the title is something.xml.  How can I check to be sure it is an xml file and handle the error when it isn't.  I have tried file_exists and access the return code (it's always 200).  Can I access the doctype and determine if it HTML or XML?

And how can I make it so if it does already exist, it doesn't over-write information already in it?

Thanks

*delurk! It had to happen sooner or later!*

OK, I am totally and utterly stumped. I have this script:

$this->clear_cache ($this->cache_dir, $this->cache_time);

if ($this->cache_time > 0) {
$current_page = $_SERVER ['REQUEST_URI'];
$current_page_encoded = base64_encode($current_page);
$current_page_path = $this->cache_dir . $current_page_encoded;

 if (file_exists($current_page_path)) { // see if there is still a file with the name of the current request URI after cache cleared
                $content = file_get_contents ($current_page_path);

return $content;
                } 
         }

Basically, it is for checking if there is a cached version of the page before running the rest of the script, using the REQUEST_URI as the identifier. So it calls a function to clear the cache, which works fine (and I've tried just deleting the cache files manually anyway).

Then it checks if we are even caching, i.e. if cache time is greater than 0. Then it uses the BASE64-encoded REQUEST_URI (under which name the file would have been cached previously) to check if a file with that name still exists in the cache dir, and if so loads it. Now, this works perfectly with a url like:

mysite/myscript/mysubpage

But when the page has parameters, like:

mysite/myscript/mysubpage?search=widgets

the file_exists function returns TRUE, even though the directory is empty. I did do a clearstatcache(); but it made no difference and anyway, it wouldn't explain why the URI with query string would fail while the regular one would not. And even if something is wrong with my code elsewhere, the fact is it is returning TRUE for a non-existent file.

Can someone prevent my slide into insanity?!