PHP file operations

//filetype()
Get the file type
//Get the file type under windows
echo filetype("D:\lamp\php5\php.ini")."< br>";
//Output file means it is a normal file
echo filetype("D:\lamp\php5")."";
//Output dir means it is a directory
//is_file()
Determine whether the given file name is a normal file
//is_dir()
Determine whether the given file name is a directory
//file_exists()
Check whether the file or directory exists
//filesize()
Get The size of the file
//is_readable()
Determine whether the given file name is readable
//is_writable()
Determine whether the given file name is writable
//is_executable()
Determine whether the given file name is executable
//filectime()
Get the creation time of the file
//filemtime()
Get the modification time of the file
//fileatime()
Get the access time of the file
//stat()
Get most of the attribute values ​​​​of the file

//clearstatcache()
Clear the file information cached by PHP
/*
*Declare a function to get most of the attributes of the file by passing in a file name
**/
function getFilePro($fileName){
 if(!file_exists($fileName)){
//If the provided file or directory does not exist, exit the function directly
echo "The target file does not exist"."";
return;
}
 if(is_file($fileName)){
//Determine whether the given file is an ordinary file
echo $fileName."Is an ordinary file";
}
if(is_dir($fileName) ){
//Determine whether the given file is a directory
echo $fileName." is a directory";
}
echo "File type:".getFileType($fileName)."< br />";
echo "File size:".getFileSize(filesize($fileName))."";
if(is_readable($fileName)){
//Determine whether the file is readable
echo "The file is readable";
}
if(is_writable($fileName)){
//Determine whether the file is writable
echo "The file is writable";
}
if(is_executable($fileName)){
//Determine whether the file is executable
echo "The file is executable";
}
echo "The creation time of the file is: ".date("Y-m-d H:i:s", filectime($fileName))."";
echo "The last update time of the file is: ".date("Y-m-d H:i:s", filemtime($fileName))."";
echo "The last time the file was opened is: ".date("Y-m-d H:i:s", fileatime($fileName))."";
}
/*
 *Declare a function to get the file type by passing in a file name
*/
function getFileType($fileName){
switch(filetype($fileName)){
case "file":
$type = "Ordinary 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 number of bytes provided is greater than or equal to 2 raised to the 40th power, the condition is true
$ return = round($bytes/pow(1024,4),2);
//Convert bytes to the equivalent size of T
$suffix = "TB";
}elseif($bytes >= pow(2 ,30)){
$return = round($bytes/pow(1024,3),2);
//Convert bytes to the equivalent size of G
$suffix = "GB";
}elseif($ bytes >= pow(2,20)){
$return = round($bytes/pow(1024,2),2);
//Convert bytes to the equivalent size of M
$suffix = "MB ";
}elseif($bytes >= pow(2,10)){
$return = round($bytes/pow(1024,1),2);
//Convert bytes to equivalent K Size
$suffix = "KB";
}else{
$return = $bytes;
//Convert bytes to the equivalent size of B
$suffix = "B";
}
return $return." " .$suffix;
}
getFilePro("D:\lamp\php5\php.ini");
$filepro=stat("D:/lamp/php5/php.ini");
//Return the size of the file Some attributes
print_r($filepro);
?>

PHP