PHP Array Sort

[PhilgB]

Ok, Ive been reading the manual for about an hour now, and none of the examples work. I have an array filled with directory names which happen to be years (ex: 2001, 2002..). They will not sort.

First of all, I thought they would be in the default ascending order when the array was created (looping through all the items in a dir). But the order I get is: 2002, 2003, 2001. How can I sort this?

Thanks.

[ir4z0r]

this definitely works:

<?PHP

  $array = array("2002", "2001", "2003");
  print_r($array);
  echo " ------ ";

  sort($array);
  print_r($array);

?>

maybe try to cast the values to integer

$array[0] = intval($array[0]);

[suntra]

Sort() is not good for numbers sorting....

See usort()...

<?php
  function cmp($a,$b) {
    if ($a == $b) return 0;
    return ($a < $b) ? -1 : 1;
  }
  $tableau = array(3,2,5,6,1);
  usort($a, "cmp");
  while(list($cle,$valeur) = each($tableau)) {
    echo "$cle: $valeur\n";
  }
 // Will give 6, 5, 3, 2, 1
 // If you want the contraire, simply change ($a < $b) to ($a > $b)
?>

[PhilgB]

how does that do anything? when is the function used?
i thought you meant cmd() instead of "cmd" but either way, nothing but errors...

[ir4z0r]

just a little typo

<?php
  function cmp($a,$b) {
    if ($a == $b) return 0;
    return ($a < $b) ? -1 : 1;
  }
  $tableau = array(3,2,5,6,1);
  usort($tableau, "cmp");
  while(list($cle,$valeur) = each($tableau)) {
    echo "$cle= $valeur --- ";
  }
 // Will give 6, 5, 3, 2, 1
 // If you want the contraire, simply change ($a < $b) to ($a > $b)
?>

[suntra]

Ah yes, sorry... it made a copy-paste without checking the code... !

[PhilgB]

Ok, here we go.... still nothing... heres the code that loads the arrays...

$handle=opendir("photos/");
while($file=readdir($handle)) {if($file != "." && $file != "..") {if(!is_file($file)) {$arrDirs[count($arrDirs)] = intval($file);}}}
closedir($handle);
for($x=0;$x<count($arrDirs);$x++) {
$handle=opendir("photos/" . $arrDirs[$x] . "/");
while($file=readdir($handle)) {if($file != "." && $file != ".." && ereg("_s.jpg$",$file)) {$arrFiles[$x][count($arrFiles[$x])] = $file;}}
closedir($handle);
}

so... if there are some things that could change to help the situation.. please tell me....

[ir4z0r]

I think you have to create an array each time using array()
here's the changed code for testing:

<?PHP

$arrDirs = array();

$handle=opendir("photos/"); 
while($file=readdir($handle))
{
  if(($file != ".") && ($file != "..") && (!is_file($file)))
  {
    $arrDirs[] = intval($file);
  }
} 
closedir($handle);

print_r($arrDirs);
rsort($arrDirs);
print_r($arrDirs);

$arrFiles = array();

for($x=0;$x<count($arrDirs);$x++)
{
  $handle=opendir("photos/" . $arrDirs[$x] . "/"); 
  while($file=readdir($handle))
  {
    if($file != "." && $file != ".." && ereg("_s.jpg",$file))
    {
      $arrFiles[$x][count($arrFiles[$x])] = $file;
    }
  }
  print_r($arrFiles[$x]);
  closedir($handle); 
}
?>

[PhilgB]

same thing.......

heres what i have...

<?php
$arrDirs = array();
$handle=opendir("photos/");
while($file=readdir($handle)) {if($file != "." && $file != "..") {if(!is_file($file)) {$arrDirs[count($arrDirs)] = $file;}}}
closedir($handle);
$arrFiles = array();
for($x=0;$x<count($arrDirs);$x++) {
	$handle=opendir("photos/" . $arrDirs[$x] . "/");
	while($file=readdir($handle)) {if($file != "." && $file != ".." && ereg("_s.jpg$",$file)) {$arrFiles[$x][count($arrFiles[$x])] = $file;}}
	closedir($handle);
}
function cmp($a,$b) {
	if ($a == $b) return 0;
	return ($a < $b) ? -1 : 1;		
}
usort($arrDirs, "cmp");
?>

[ir4z0r]

and what doesn't work? it just doesn't sort?

<?php
function cmp($a,$b) {
    if ($a == $b) return 0;
    return ($a < $b) ? -1 : 1;        

}

$arrDirs = array();
$handle=opendir("photos/");
while($file=readdir($handle)) {if($file != "." && $file != "..") {if(!is_file($file)) {$arrDirs[count($arrDirs)] = $file;}}}
closedir($handle);
usort($arrDirs, "cmp");

$arrFiles = array();
for($x=0;$x<count($arrDirs);$x++) {
    $handle=opendir("photos/" . $arrDirs[$x] . "/");
    while($file=readdir($handle)) {if($file != "." && $file != ".." && ereg("_s.jpg$",$file)) {$arrFiles[$x][count($arrFiles[$x])] = $file;}}
    closedir($handle);
    sort($arrFiles[$x]);
}
?>

this should sort the directories (numbers) and the files in them (not only numbers)

[PhilgB]

Nothing is happening to the order of the array. Ive even changed the loops to use array_push instead, hoping it would fill the array in the order the directories are already in (alpha?)

But still nothing.

[ir4z0r]

the directories on my system appear to have always the right order
I changed first loop for testing only

but the rest works 100% on my sys:

<?php
function cmp($a,$b) {
    if ($a == $b) return 0;
    return ($a < $b) ? -1 : 1;        

}

// random order of directories, but they really exist
$arrDirs = array("2002","2004","2003","3008","2000","2001");
// print order before sorting
print_r($arrDirs);

usort($arrDirs, "cmp");

$arrFiles = array();
for($x=0; $x<count($arrDirs); $x++)
{
    $handle=opendir("photos/" . $arrDirs[$x] . "/");
    // make every subdir an array - nessecary!!!
    $arrFiles[$x] = array();
    while($file=readdir($handle))
    {
      if($file != "." && $file != ".." && ereg("_s.jpg$",$file))
      {
        $arrFiles[$x][count($arrFiles[$x])] = $file;
      }
    }
    closedir($handle);
    sort($arrFiles[$x]);
}

// print final order of dirs
print_r($arrDirs);
?>