php中可以显示文件的各种属性，这些属性包括文件的最后访问时间、最后修改时间、文件大小等。
returning information about a fileprint the size of the file is ;print filesize( samplefile.doc );print
;$atime = fileatime( samplefile.doc );print this file accessed on ;print date(l, m d, y g:i a, $atime);print
;$mtime = filemtime( samplefile.doc );print this file was modified on ;print date(l, m d, y g:i a, $mtime);print
;$ctime = filectime( samplefile.doc );print this file was changed on ;print date(l, m d, y g:i a, $ctime);?>
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