Sort（）返回一个乱序数组

Question

I have an array that is populated from the function iterator_to_array. After I sort it (tried asort(), ksort() and rsort() and all of them show the same result: an out of order array...

This is my code.

$fi = new FilesystemIterator($location, FilesystemIterator::SKIP_DOTS);
$file_paths = iterator_to_array( $fi, false);
rsort($file_paths);
echo "<pre>", print_r($file_paths), "</pre>";

The print_r returns:

Array
(
[0] => SplFileInfo Object
    (
        [pathName:SplFileInfo:private] => /opt/lampp/htdocs/majo/log_files/teste/log2014324.txt
        [fileName:SplFileInfo:private] => log2014324.txt
    )

[1] => SplFileInfo Object
    (
        [pathName:SplFileInfo:private] => /opt/lampp/htdocs/majo/log_files/teste/log2014325.txt
        [fileName:SplFileInfo:private] => log2014325.txt
    )

[2] => SplFileInfo Object
    (
        [pathName:SplFileInfo:private] => /opt/lampp/htdocs/majo/log_files/teste/log2014323.txt
        [fileName:SplFileInfo:private] => log2014323.txt
    )

[3] => SplFileInfo Object
    (
        [pathName:SplFileInfo:private] => /opt/lampp/htdocs/majo/log_files/teste/log2014322.txt
        [fileName:SplFileInfo:private] => log2014322.txt
    )

)

After a routine to clear the name of the file I get this output:

2014324.txt
2014325.txt
2014323.txt
2014322.txt

However because of rsort() (the function used at that time) it should be:

2014325.txt
2014324.txt
2014323.txt
2014322.txt

Everytime the 2014325.txt is out of place and I can't seem to get it in place, does anyone know how to fix this?

I can implement a solution that involves doing the sorting in a manual way, but it will spend a lot more time and resources, however.

PS: ksort() output:

2014322.txt
2014323.txt
2014325.txt
2014324.txt

Answer 1

iterator_to_array gives you an array of objects, but php has no clue how to compare them. You have to extract the sort key (e.g. a path) and tell php to sort by this key, for example:

$fi = new FilesystemIterator($location, FilesystemIterator::SKIP_DOTS);
$file_paths = array();
foreach($fi as $f)
    $file_paths[$f->getRealPath()] = $f;
ksort($file_paths);

If you only need file paths and not interested in additional data SplFileInfo provides, then glob might be a simpler option:

$file_paths = glob("$location/*");

Note that the glob output is already sorted.