Failed to open dir : Bad file descriptor - php

Question

I face this problem. When i try to open the file list in other server which is 10.200.4.202. The error below appears.
When I try using a local host, the file list can be viewed normally. I think the code is not the error but the server setting is not right.
I used IIS 10.0, PHP 7.3.15
This is what appears on web
status[parsererror] content[SyntaxError: Unexpected token < in JSON at position 0]
and this is the error in f12
Warning:
opendir(\\10.200.4.202\y\1.InspCheckSheet_PDF\log,\\10.200.4.202\y\1.InspCheckSheet_PDF\log): Access is denied. (code: 5) in C:\PGMPIS_Web\public_html\ics_filing\loglist_sub.php on line 68
Warning:
opendir(\\10.200.4.202\y\1.InspCheckSheet_PDF\log): failed to open dir: Bad file descriptor in C:\PGMPIS_Web\public_html\ics_filing\loglist_sub.php
on line 68
{"querytime":"2020-05-14 09:58:50","other_status":"ERR","errmsg":""}
Here's the code
<?php
$dir_log = '\\\\10.200.4.202\\y\\1.InspCheckSheet_PDF\\log';
require_once 'Log.php';
$log = Log::factory('file', 'log/okaspe.log', 'loglist_sub'); //$log->log('teeeeest!');
//$type = $_REQUEST['type'];
try{
// Set query_time
$emsg = "";
$now = new DateTime();
$res['querytime'] = $now->format('Y-m-d H:i:s');
//$res['querytime'] = $now->format('Y-m-d g:i:s A');
// Obtain log file name list → $fn[]
$cnt = $pos = 0;
unset($fn); // clear $fn for safety
if( $dir = opendir($dir_log) ) { // add # infront of opendir by asyraf
while (($file = readdir($dir)) !== false ) {
$pos = strpos ($file, 'main_'); // faster than preg_match() for simple search
if( $pos !== false && $pos == 0) {
$cnt++;
$fn[] = $file;
}
}
closedir($dir);
} else {
throw new Exception("Obtain Log File List failed......");
}
// sort in descending order
rsort($fn); //$log->log( print_r($fn, true) );
//set response
$res['list'] = $fn;
$res['cnt'] = $cnt;
} catch( Exception $e ) {
// Functional Err exception
$res["other_status"] = "ERR";
$res["errmsg" ] = $emsg;
$log->log($e->getMessage(), PEAR_LOG_ERR); // logging
} finally {
//DB disconnect (absolutely and always)
$pdo = null;
// Response in Json
header('Content-Type: application/json; charset=utf-8');
$json = json_encode( $res ); //$log->log($json, PEAR_LOG_ERR);
echo $json;
}
exit;
?>