reversing

[Dillenger]

How do I reverse the order of an array?

What I mean is, I have this file that reads this directory, and gets the images inside, and displays them in order of when they were uploaded... but I would like to reverse it, so the most recent image shows first, and so on... can this be done?

[LordShryku]

Well, you could loop through them backwards, sort them by date, or [man]array_reverse[/man].

[Dillenger]

I'm trying to put in the array reverse now, but its not working, maybe you could help, here is the code i'm using:

I put the array_reverse down near the bottom, this is the error i'm getting:

Warning: array_reverse(): The argument should be an array in /home/dhill/public_html/ysd/galleries/westcoast/index.php on line 214

//set variables when undefined
	if ($columns == "") $columns = 6; 	//How many images displayed per line
	if ($rows == "") $rows = 1; 		//How many row are display per page

//find this number, and use it below
	$imagenumber = $columns * $rows; 	//how many images per page

//set directory depending on state
	if ($res == ""){
		if ($resolution == "Low Res" or $resolution == ""){
			$imagedir = $lowimages;
			$res = 0;
		}
			else{
				$imagedir = $fullimages;
				$res = 1;
			}
	}
		else {
			if ($res == 0) $imagedir = $lowimages;
			if ($res == 1) $imagedir = $fullimages;
		}

//determine page state
	if ($page == "") $page = "1";
	$begin = ($page * $imagenumber) - $imagenumber;
	$end = ($page * $imagenumber) - 1;

//get files
	$j=0; //just initializing
	$handle=opendir($imagedir); //open image folder
	while (false!==($file = readdir($handle))) {
		if ($file != "." && $file != "..") {
			//echo "$file";
			$imageArray[$j]=$file;

		$j++;
	}
}
closedir($handle); 

//find out the how many images there are
	$numimages = sizeof($imageArray);



//begin writing table

if ($show != "") //display image if chosen


$i=0; //nothing to see, just initializing

for ($x=$begin; $x <= $end; $x++){
	//begin writing images
	echo "";
	if ($imageArray[$x] != ""){ //make sure we don't include images that aren't there
	$img_result = array_reverse($imageArray[$x]);
	print "<a href=index.php?page=$page&columns=$columns&rows=$rows&res=$res&show=$img_result><img src=$thumbdir/img_result border=0></a>&nbsp;&nbsp;&nbsp;";
	}
	echo "";
	//write end column when needed
	++$i;
	if($i == $columns) { print ""; 
		$i = 0;
	}

}

$pages = ceil($numimages / $imagenumber);
if ($pages != 1){
	echo("<br><br>Page: ");

	for ($d=1; $d<=$pages; $d++){
	echo "<a href=\"index.php?page=$d&columns=$columns&rows=$rows&res=$res\">$d</a> ";
	}
}
if ($show != "") {echo "<br><br><img src=$imagedir/$show><br><br>";}

[LordShryku]

Well, it looks like you're reversing an element, not the array. Move this up outside of your loop.

$imageArray = array_reverse($imageArray);

[Dillenger]

thanks dude, you saved my life. 🙂