[SOLVED] Get highest file name

[aQ]

Hello!

 

I have a folder with a lot of .php files in it. They are named *somestuff*_*number*.php (blabla_10.php). I want to find the file with the highest value in its name. Is this possible?

 

Thank you.

[fanfavorite]

Something like this:

 

$dir = $_SERVER['DOCUMENT_ROOT'] . '/phpfolder';

$dirHandle = opendir($dir);

$highnumber = 0;

while ($file = readdir($dirHandle)) {

if(!is_dir($file)) {

$num = substr(strrchr($file, "_"), 0);

$number = $str_replace('.php','',$num);

if ($highnumber < $number) {

$highnumber = $number;

}

}

}

closedir($dirHandle);

[fanfavorite]

Sorry right under $highnumber = $number should be:

 

$highpg = $file;

[aQ]

Thank you, but there is an error:

 

Fatal error: Function name must be a string in /path/to/script.php on line 9

 

The script:

<?php

$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';
$dirHandle = opendir($dir);
$highnumber = 0;
while ($file = readdir($dirHandle)) {
   if(!is_dir($file)) {
      $num = substr(strrchr($file, "_"), 0);
      $number = $str_replace('.php','',$num);
      if ($highnumber < $number) {
         $highpg = $file;
      }
   }
}
closedir($dirHandle);

print $highpg;

?>

[lightningstrike]

simply replace $str_replace with str_replace.

 

<?php

$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';
$dirHandle = opendir($dir);
$highnumber = 0;
while ($file = readdir($dirHandle)) {
   if(!is_dir($file)) {
      $num = substr(strrchr($file, "_"), 0);
      $number = str_replace('.php','',$num);
      if ($highnumber < $number) {
         $highpg = $file;
      }
   }
}
closedir($dirHandle);

print $highpg;

?>

[aQ]

Thanks, no errors now, but no output either. Anyone?

[lightningstrike]

<?php
$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';
$dirHandle = opendir($dir);
$highnumber = 0;
while (false !== ($file = readdir($dirHandle))) {
   if(is_dir($file)) {
      $num = substr(strrchr($file, "_"), 0);
      $number = str_replace('.php','',$num);
      if ($highnumber < $number) {
         $highpg = $file;
      }
   }
}
closedir($dirHandle);

print $highpg;
?>

I believe there was an accidental ! (not) operator placed in front of is_dir, try the new code.

 

EDIT: changed the while loop to use false!== which is the php standard for readdir

[aQ]

Still does not display anything.

[lightningstrike]

<?php
$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';
$dirHandle = opendir($dir);
$highnumber = 0;
while (false !== ($file = readdir($dirHandle))) {
   if(is_dir($file)) {
      $num = substr(strrchr($file, "_"), 0);
      $number = str_replace('.php','',$num);
      if ($highnumber < $number) {
         $highpg = $file;
         $highnumber = $number;
      }
   }
}
closedir($dirHandle);

print $highpg;
?>

 

That should most likely fix it. Assuming you have correctly entered your servers path in $dir variable.

[fanfavorite]

No !is_dir($file), means that it is NOT A DIRECTORY, which is the correct if character.  Try taking the last "/" out of the $dir... so $_SERVER['DOCUMENT_ROOT'].'/my/path'.  

 

<?php

$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';

$dirHandle = opendir($dir);

$highnumber = 0;

while ($file = readdir($dirHandle)) {

  if(is_dir($file)) {

     $num = substr(strrchr($file, "_"), 0);

     $number = str_replace('.php','',$num);

     if ($highnumber < $number) {

        $highpg = $file;

     }

  }

}

closedir($dirHandle);

 

print $highpg;

?>

 

[aQ]

Still wont display anything. Thanks for trying guys.

[lightningstrike]

lol good point fanfavorite wasn't really looking carefully

[fanfavorite]

Ok, lets do some debugging.  Add this $count variable

 

<?php

$count = 0;

$dir = $_SERVER['DOCUMENT_ROOT'] . '/my/path/';

$dirHandle = opendir($dir);

$highnumber = 0;

while ($file = readdir($dirHandle)) {

  if(is_dir($file)) {

     $count++;

     $num = substr(strrchr($file, "_"), 0);

     $number = str_replace('.php','',$num);

     if ($highnumber < $number) {

        $highpg = $file;

     }

  }

}

closedir($dirHandle);

 

print $highpg;

print $count;

?>

 

If $count is 0, then it is not getting into the if statement at all, which means your path to directory is wrong.  If it is, it should be the number of files in that folder.  

[aQ]

Count is 2, that's the correct number of files by now, but the number of the highest file is 3

[fanfavorite]

After $number = str_replace('.php','',$num);

echo $number;

 

Make sure that it is displaying the number of the file correctly. 

[aQ]

That displays nothing. So it seems like $number has no content?

[trq]

<?php

  $arr = glob('/path/to/files/*.php');
  sort($arr);
  echo array_pop($arr);

?> 

[aQ]

That's great. I used str_replace to replace the path/to/file_ with "", and .php with "". Then, there was only a number left. That was exactly what I wanted. Thanks a lot!