PHP file Operations

FileType () Get the type of file Get the file types under Windows echo filetype ("D:\\lamp\\php5\\php.ini"). " "; Output file representation is a normal document echo filetype ("d:\\lamp\\php5"). " "; Output dir indicates a directory Is_file () Determines whether the given file name is a normal file Is_dir () Determines whether a given file name is a directory File_exists () Check whether a file or directory exists FileSize () Get the size of the file Is_readable () Determines whether a given file name is readable Is_writable () Determines whether a given file name can be written Is_executable () Determines whether a given file name is executable Filectime () Gets the creation time of the file Filemtime () Get the file modification time Fileatime () Get access time for a file Stat () Get most property values for a file Clearstatcache () Clear the file information that is cached by PHP /* * Declare a function to get most of the properties of a file by passing in a file name **/ function Getfilepro ($fileName) { if (!file_exists ($fileName)) { If the supplied file or directory does not exist, exit the function directly echo "Destination file does not exist". " "; Return } if (Is_file ($fileName)) { Determines whether a given file is a normal file echo $fileName. " is an ordinary file "; } if (Is_dir ($fileName)) { Determines whether a given file is a directory echo $fileName. " is a directory "; } echo "File type:". Getfiletype ($fileName). " "; echo "File Size:". GetFileSize (FileSize ($fileName)). " "; if (is_readable ($fileName)) { Determine if a file is readable echo "File readable "; } if (is_writable ($fileName)) { Determine if the file is writable echo "file can be written "; } if (is_executable ($fileName)) { Determine if a file is executable echo "File executable"; } echo "File creation time is:". Date ("Y-m-d h:i:s", Filectime ($fileName)). " "; echo "The last updated time for the file is:". Date ("Y-m-d h:i:s", Filemtime ($fileName)). " "; The last open time for the echo file is:. Date ("Y-m-d h:i:s", Fileatime ($fileName)). " "; } /* * Declare a function to get the type of the file by passing in a file name */ function Getfiletype ($fileName) { Switch (filetype ($fileName)) { Case "File": $type = "Normal file"; Break Case "DIR": $type = "Directory file"; Break Case "BLOKC": $type = "block device file"; Break Case "char": $type = "character device file"; Break Case "FIFO": $type = "Named pipe file"; Break Case "link": $type = "symbolic link"; Break Case "UNKONWN": $type = "Unknown type"; Break Default $type = "No type detected"; } return $type; } /* * Declare a function to convert the file size */ function GetFileSize ($bytes) { if ($bytes >= pow (2,40)) { If the supplied number of bytes is greater than or equal to 2 of the 40 parties, then the condition is established $return = Round ($bytes/pow (1024,4), 2); Convert bytes to the same size as T $suffix = "TB"; }elseif ($bytes >= pow (2,30)) { $return = Round ($bytes/pow (1024,3), 2); Converts bytes to the same size as G $suffix = "GB"; }elseif ($bytes >= pow (2,20)) { $return = Round ($bytes/pow (1024,2), 2); Convert bytes to the same size as M $suffix = "MB"; }elseif ($bytes >= pow (2,10)) { $return = Round ($bytes/pow (1024,1), 2); Convert bytes to the same size as K $suffix = "KB"; }else{ $return = $bytes; Convert bytes to the same size as B $suffix = "B"; } return $return. " ". $suffix; } Getfilepro ("D:\\lamp\\php5\\php.ini"); $filepro =stat ("D:/lamp/php5/php.ini"); Returns most of the properties of a file Print_r ($filepro); ?> Copy Code

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