scandir() scan by increasing number - php

Question

I want to scan a directory and add all the file-names to an array in ascending order (numeric, no letters). What appears to be happening is scandir() is sorting them by highest value of the first number and not the whole number. I need to take into account missing text files, so if 9.txt was missing, 10.txt would take its place (no empty spot in array).
Here is the code:
<?php
$array=array();
$int = 1;
$holder=scandir("/postexamples/");
krsort($holder);
foreach($holder as $x)
{
if(!is_dir($x)){
$array[$int]=$x;
$int++;
}
}
echo PHP_EOL . PHP_EOL . "Final array: " , PHP_EOL;
print_r($array);
?>
Which outputs the array:
Array ( [1] => 9.txt [2] => 8.txt [3] => 7.txt [4] => 6.txt [5] => 5.txt [6] => 4.txt [7] => 3.txt [8] => 20.txt [9] => 2.txt [10] => 19.txt [11] => 18.txt [12] => 17.txt [13] => 16.txt [14] => 15.txt [15] => 14.txt [16] => 13.txt [17] => 12.txt [18] => 11.txt [19] => 10.txt [20] => 1.txt )
Is there a better (and preferably working) way to do this? I need it to be like [1] => 1.txt [2] => 2.txt
EDIT:
I need the array to appear like this:
Array ( [1] => 1.txt [2] => 2.txt [3] => 3.txt [4] => 4.txt [5] => 5.txt [6] => 6.txt [7] => 7.txt [8] => 8.txt [9] => 9.txt [10] => 10.txt [11] => 11.txt [12] => 12.txt [13] => 13.txt [14] => 14.txt [15] => 15.txt [16] => 16.txt [17] => 17.txt [18] => 18.txt [19] => 19.txt [20] => 20.txt )
And if one file (for example, 17.txt) was missing, it would look like this:
Array ( [1] => 1.txt [2] => 2.txt [3] => 3.txt [4] => 4.txt [5] => 5.txt [6] => 6.txt [7] => 7.txt [8] => 8.txt [9] => 9.txt [10] => 10.txt [11] => 11.txt [12] => 12.txt [13] => 13.txt [14] => 14.txt [15] => 15.txt [16] => 16.txt [17] => 18.txt [18] => 19.txt [19] => 20.txt )

Answer 1

You need to do a natural sort to get the files in the correct order (20.txt, 10.txt, 2.txt, 1.txt). The function for doing this is natsort.
$sortPath = 'postexamples/';
$files = array();
foreach (scandir($sortPath) as $file) {
if (is_file("$sortPath/$file")) {
$files[] = $file;
}
}
echo PHP_EOL . PHP_EOL . "Final array: " , PHP_EOL;
natsort($files);
$files = array_values($files); // re-key array
print_r($files);
Result
Final array:
Array
(
[0] => 1.txt
[1] => 2.txt
[2] => 4.txt
[3] => 10.txt
[4] => 20.txt
)

Answer 2

Id do it like this.
$files = array_diff(scandir("/postexamples/"), array('.', '..' ));
$array = array();
foreach($files as $file){
if(!is_dir($file)){
$array[]=$file;
}
}
sort($array, SORT_NUMERIC);
You may have to use usort, if it doesn't do the numbers right. Also if you are on php >= 5.4 you may be able to use,
scandir("/postexamples/", SCANDIR_SORT_ASCENDING );
But I haven't tried it. Using sort with numeric flag ( don't forget it's just an array like any other )
$a = Array ( '9.txt', '8.txt', '7.txt', '6.txt', '10.txt', '1.txt');
echo "<pre>";
var_export($a);
echo "<br>";
sort($a, SORT_NUMERIC);
var_export($a);
Result
array (
0 => '9.txt',
1 => '8.txt',
2 => '7.txt',
3 => '6.txt',
4 => '10.txt',
5 => '1.txt',
)
array (
0 => '1.txt',
1 => '6.txt',
2 => '7.txt',
3 => '8.txt',
4 => '9.txt',
5 => '10.txt',
)
So essentially sort($a, SORT_NUMERIC);

Answer 3

Try this ,i hope this will help you:
$ar=array();
$g=scandir("/postexamples/");
krsort($g)
foreach($g as $x)
{
if(is_dir($x))$ar[$x]=scandir($x);
else $ar[]=$x;
}
print_r(sort($ar));