image gallery by date

[Capt_n_Hector]

Hi, I know this has been discussed here many times but nothing from past threads is working for me.

This is what I have:

if ($handle = opendir('/Users/harrison/Sites/images/photos/thumbnails')) {
	while (false !== ($file = readdir($handle))) 
	{ 
	if ($file != "." && $file != ".." && $file != ".DS_Store") 
		{ 
          	echo "<div class='gallery'>
\n
<a href='images/photos/display.shtml/$file' class='newWindow'>
\n
<img alt='$file' class='gallery' src='images/photos/thumbnails/$file' />
\n</a>\n</div>\n\n"; 
       		} 
   	}
	closedir($handle); 
}

It's pretty much straight out of the php.org documentation. It's nice, but it only displays in alphabetical order. I've been trying to do the same thing, but in chronological order, but no dice. I'm as 'Newbie' as they come, so an explanation beyond 'use filemtime and an array' would be greatly appreciated.

[Shrike]

Pretty much what it says, use an array and sort it on filemtime 🙂

When you iterate through the directory, push the filename and filemtime to a hashlist

if ($handle = opendir('/Users/harrison/Sites/images/photos/thumbnails')) { 
    while (false !== ($file = readdir($handle))){  

      if ($file != "." && $file != ".." && $file != ".DS_Store"){  

        $files[] = array($file, filemtime($file));
      } 
    closedir($handle);  

  }
}

uksort($files, "cmp");

function cmp($a, $b){
 return strcasecmp($files[$a][1], $files[$b][1]);
}

Sorry haven't tested the above but you get the idea.

[Capt_n_Hector]

Originally posted by Shrike
Pretty much what it says, use an array and sort it on filemtime 🙂

When you iterate through the directory, push the filename and filemtime to a hashlist

if ($handle = opendir('/Users/harrison/Sites/images/photos/thumbnails')) { 
    while (false !== ($file = readdir($handle))){  

      if ($file != "." && $file != ".." && $file != ".DS_Store"){  

        $files[] = array($file, filemtime($file));
      } 
    closedir($handle);  

  }
}

uksort($files, "cmp");

function cmp($a, $b){
 return strcasecmp($files[$a][1], $files[$b][1]);
}

Sorry haven't tested the above but you get the idea. [/B]

Thanks, and I do get the idea... but it doesn't work. The server returns an error for the first line of the php code.

[Capt_n_Hector]

it still doesn't work... I tried replacing

filemtime($file)

with

filemtime($dir."/".$file)

but I'm getting a parse error on the line

if ($handle = opendir($dir)) {

Akk!

[Capt_n_Hector]

Ok, so it seems my text editor did something strange with whitespaces. Now there's a parse error on

function_cmp($a, $b){ 

[Shrike]

function_cmp should be function cmp. Can't explain the other errors w/out seeing the code.

[Capt_n_Hector]

Originally posted by Shrike
function_cmp should be function cmp. Can't explain the other errors w/out seeing the code.

ah.... that's odd. In all my text editors, the underscore shows up as just a regular space, except it does show up when posting the code here. I fixed that, here's the code now:

$dir = '/Users/harrison/Sites/images/photos/thumbnails';

if ($handle = opendir($dir)) {
   while (false !== ($file = readdir($handle))){
      if ($file != "." && $file != ".." && $file != ".DS_Store"){
        $files[] = array($file, filemtime($dir."/".$file));
      }
   closedir($handle);
  } 
} 

uksort($files, "cmp"); 

function cmp($a, $b){ 
 return strcasecmp($files[$a][1], $files[$b][1]); 
}

now I get the errors:

Warning: readdir(): 2 is not a valid Directory resource in/Users/harrison/Sites/archives/pixels/photographs/index.php on line 123

Warning: uksort(): The argument should be an array in/Users/harrison/Sites/archives/pixels/photographs/index.php on line 131

[joene]

Originally posted by Capt'n Hector
ah.... that's odd. In all my text editors, the underscore shows up as just a regular space, except it does show up when posting the code here. I fixed that, here's the code now:

$dir = '/Users/harrison/Sites/images/photos/thumbnails';

if ($handle = opendir($dir)) {
   while (false !== ($file = readdir($handle))){
      if ($file != "." && $file != ".." && $file != ".DS_Store"){
        $files[] = array($file, filemtime($dir."/".$file));
      }
   closedir($handle);
  } 
} 

uksort($files, "cmp"); 

function cmp($a, $b){ 
 return strcasecmp($files[$a][1], $files[$b][1]); 
}

now I get the errors:

Warning: readdir(): 2 is not a valid Directory resource in/Users/harrison/Sites/archives/pixels/photographs/index.php on line 123

Warning: uksort(): The argument should be an array in/Users/harrison/Sites/archives/pixels/photographs/index.php on line 131 [/B]

Hi,

which version of PHP do you use? Note that before version 4.0.0-RC2 '!==' not existed.

The error uksort() returned is normal, cause there is no $files array ... When you fix the first error, the second error will not appear. Better is to check $files if it's an array or not.

-- Joene

[Capt_n_Hector]

I'm using 4.3.2

[Capt_n_Hector]

sorry to drag this back up, but.... anyone?

[LordShryku]

I used an array or extensions, but that's just a preference. Try this anyway. It seperates times and files into seperate arrays, sorts the time, gets the keys and just echo's based on key.

<?php
$exts   = array("png","gif","jpg");
$path   = "/home/starport/public_html/mng/images";
$handle = opendir($path);
$files  = array();
$times  = array();
while($file = readdir($handle)) {
   if(in_array(substr(strtolower($file),-3),$exts)) {
      $files[] = $file;
      $times[] = filemtime($path."/".$file);
   }
}
closedir($handle);
asort($times);
$order = array_keys($times);
foreach($order as $o) {
   echo $files[$o]." - ".$times[$o]."<br />";
}
?>

[LordShryku]

And here's another, probably more reliable way

<?php
$exts   = array("png","gif","jpg");
$path   = "/home/starport/public_html/mng/images";
$handle = opendir($path);
$files  = array();
while($file = readdir($handle)) {
   if(in_array(substr(strtolower($file),-3),$exts)) {
      $files[$file] = filemtime($path."/".$file);
   }
}
closedir($handle);
asort($files);
foreach($files as $key => $value) {
   echo $key." - ".$value."<br />";
}
?>

[Capt_n_Hector]

Originally posted by LordShryku
And here's another, probably more reliable way

<?php
$exts   = array("png","gif","jpg");
$path   = "/home/starport/public_html/mng/images";
$handle = opendir($path);
$files  = array();
while($file = readdir($handle)) {
   if(in_array(substr(strtolower($file),-3),$exts)) {
      $files[$file] = filemtime($path."/".$file);
   }
}
closedir($handle);
asort($files);
foreach($files as $key => $value) {
   echo $key." - ".$value."<br />";
}
?>

[/B]

Awsome. Perfect. Thank you!

[Capt_n_Hector]

Thanks for all the help so far, this is great.

Ok, I've been reading webmonkey's tutorial on building a php gallery with multiple pages but I'm having a bit of trouble using their page selector to work. I think what I have is very close, but I could be wrong.

The problem is that I get the first three images of the array: it doesn't start at $i.

Here's what I have:

<?php
if(!isSet($_REQUEST["start"])){
      $_REQUEST["start"] = 0;
}
$i = $_REQUEST["start"];
$photos_per_page = 3;
$prev_start = $_REQUEST["start"] - $photos_per_page;
$next_start = $_REQUEST["start"] + $photos_per_page;
$photos_per_page = 3;


$exts = array("png","gif","jpg");
$path = "/Users/harrison/Sites/images/photos"; 
$handle = opendir($path); 
$files = array(); 
$total_photos = 12;

while($file = readdir($handle)) { 
   if(in_array(substr(strtolower($file),-3),$exts)) { 
      $files[$file] = filemtime($path."/".$file); 
   } 
} 
closedir($handle); 
arsort($files); 
foreach($files as $key => $value) { 
	if ($i >= $_REQUEST["start"] && $i < $next_start && $i <= $total_photos && $i >= 0) {
		echo "<div class='gallery'>\n<a href='images/photos/display.shtml/".$key."' class='newWindow'>\n<img alt='".$key."' class='gallery' src='images/photos/thumbnails/".$key."' />\n</a>\n</div>\n\n"; 
   		$i++;
   		} 
   	}




?>




<?php
//print out navigation links
if(($_REQUEST["start"] == 0) && ($next_start < $total_photos)){

//you're at the beginning of the photo gallery

?>

  <a href="archives/pixels/photographs/index.php?start=<?php print($next_start); ?>">next page</a>&#187;

<?php
} 
elseif (($_REQUEST["start"] > 0) && ($next_start < $total_photos)){ 

//you're in the middle of the photo gallery

?>

  &#171;<a href="archives/pixels/photographs/index.php?start=<?php print($prev_start); ?>">prev page</a>
  |
  <a href="archives/pixels/photographs/index.php?start=<?php print($next_start); ?>">next page</a> &#187;

<?php
} 
elseif ((($_REQUEST["start"] > 0) && (($next_start - $photos_per_page) > $total_photos)) or ($_REQUEST["start"] < 0)){ 

//covering all bases

?>

  nav error.




<?php
} 
elseif(($_REQUEST["start"] == 0) && ($next_start > $total_photos)){ 

//you're in a photo gallery with only one page of photos

?>
  _
<?php
} 

else { 

//you're at the end of the photo galley

?>

  &#171;
  <a href="archives/pixels/photographs/index.php?start=<?php print($prev_start); ?>
  ">prev page</a>

<?php
}
?>