PHP - 搜索并替换然后排序和回显

Question

I've managed (well, stackoverflow has shown me how) to search a directory on my server and echo and image. The trouble is the images in the folder are named by an IP camera yy_mm_dd_hh_mm where dd (and other date digits) have either one or two digits. I need them to have a preceeding zero so that I don't end up with, for example, an image taken at 9:50am being treated as a higher value than the photo taken more recently, at 10:05am. (I want it to treat it as 09_50 and 10_05 to fix the issue).

I've looked at search and replace but cannot get this to work within my current code:

function webcam_image () {
foreach (glob( "../camera/IPC_IPCamera*.jpg") as $f ) {
$list[] = $f;
}
sort($list);
echo array_pop($list);   
}

example file = IPC_IPCamera_13_7_24_9_57_45.jpg

any help would be much appreciated!

Thanks

Ali

Answer 1

I would ignore the file name altogether and use a DirectoryIterator, fetching the files actual modified date. Something like this might work.

$files = array();
$iterator = new \DirectoryIterator('/path/to/dir');
foreach ($iterator as $file) {
  if(! $file->isDot()) $files[$file->getMTime()] = $file->getFilename();
}
ksort($files);

print_r($files);

Take a look here for more information: http://php.net/manual/en/class.directoryiterator.php