Check if URL exists

[KelloKitty]

Can someone tell me how I would check to see if the url exists before i go into displaying stuff. So that on the page it will display something like "doesnt exit" instead of "Warning: readdir(): supplied argument is not a valid Directory resource"

 

Thanks!

 

if( !empty($_POST['year']) ) {
        $year = $_POST['year'];
        $month = $_POST['month'];
        $day = $_POST['day'];
        $hourFrom = $_POST['hourFrom'];
        $hourTo = $_POST['hourTo'];
        
        $url = "/bla/bla/$year$month$day/";
    
        // check if url exists here?
    
       $dir = opendir($url);

      while ($file = readdir($dir)) { 
       //display files

[Alex]

file_exists

[KelloKitty]

Don't i have to check to see if the url exists before the file or else I will get an opendir error?

 

Or you are saying I can use file_exists function on a url?

[Alex]

Check if the url exists? You mean the directory? file_exists, if you read documentation, checks files and directories.

[Errant_Shadow]

there's 2 ways I can think of off the top of my head

 

if( !empty($_POST['year']) )
{
$year = $_POST['year'];
$month = $_POST['month'];
$day = $_POST['day'];
$hourFrom = $_POST['hourFrom'];
$hourTo = $_POST['hourTo'];

$url = "/bla/bla/$year$month$day/";

if (!$dir = opendir($url)) // if the operation returns nothing...
{
	echo '<p>No Such Directory ('.$url.')</p>';
}
else
{
	while ($file = readdir($dir))
	{ 
		// display files
	}
}
}

 

or

 

if( !empty($_POST['year']) )
{
$year = $_POST['year'];
$month = $_POST['month'];
$day = $_POST['day'];
$hourFrom = $_POST['hourFrom'];
$hourTo = $_POST['hourTo'];

$url = "/bla/bla/$year$month$day/";

if (!file_exists($url)) // if the specific file does not exist on that server...
{
	echo '<p>No Such File ('.$url.')</p>';
}
else
{
	$dir = opendir($url);
	while ($file = readdir($dir))
	{ 
		// display files
	}
}
}

 

though I've never tested that second one on files not on my own server.

[KelloKitty]

Awesome totally works thanks guys