linux-php using the Filectime function to get the modified time of the file returns 1970

Environment: CentOS6.5
Using PHP to get the file modification time, the result is 1970, which is why?
Code:

$handler=opendir(dirname(__FILE__)."/uploadfiles/down");while($file=readdir($handler)){    if($file=="." || $file==".."){        continue;    }    echo $file.'-'.date('Y-m-d H:i:s',filectime($file)).'
';}

Results:

and. And.. The time is normal, puzzled

Thank you, gentlemen.

Reply content:

Environment: CentOS6.5
Using PHP to get the file modification time, the result is 1970, which is why?
Code:

$handler=opendir(dirname(__FILE__)."/uploadfiles/down");while($file=readdir($handler)){    if($file=="." || $file==".."){        continue;    }    echo $file.'-'.date('Y-m-d H:i:s',filectime($file)).'
';}

Results:

and. And.. The time is normal, puzzled

Thank you, gentlemen.

Using Filemtime () is the last modification time to get the file content, and the Filectime () you use is used to get the last Inode modification time for the file.

Path Problem · That's my IQ.

