You can change 1048576 for your files. It represents 1 MB.
With this code you can scan and delete all files in all directories and subdirectories.
<?php
function listFolderFiles($dir){
$ffs = scandir($dir);
unset($ffs[array_search('.', $ffs, true)]);
unset($ffs[array_search('..', $ffs, true)]);
// prevent empty ordered elements
if (count($ffs) < 1)
return;
foreach($ffs as $ff){
if (strstr($dir,".git")){
continue;
}
if (filesize($dir.'/'.$ff) > 1048576 ){
echo $dir.'/'.$ff . "\n";
unlink($dir.'/'.$ff);
}
if(is_dir($dir.'/'.$ff)) listFolderFiles($dir.'/'.$ff);
}
}
listFolderFiles('.');