File manipulation functions in PHP (read-Write, properties, executable

if (is_executable ("test.txt"))//to judge a file
{
echo "File executable"; Output results
}
else//If the file is not executable
{
echo "File not executable"; Output information
}

//

Var_dump (Is_file ("Test.txt")). "        <br> "; To judge a file
Var_dump (Is_file ("C:/windows")). "       <br> "; To judge a file

//

$file = "Test.txt"; Definition file
$filestat =stat ($file); Return file information
Print_r (Array_slice ($filestat, 13)); Output results

//

$path =pathinfo ("test.txt"); Define Path
echo $path ["DirName"]. "         <br> "; Output array dirname
echo $path ["basename"]. "        <br> "; Output result Array basename
echo $path ["extension"]. "         <br> "; Output results Extension

//

$filename = "Test.txt"; Definition file
if (is_writable ($filename))//Determine if the file is writable
{
echo "File writable"; Output information
}
else//If the file is not writable
{
echo "File not writable"; Output information
}
/*
The output is similar to the following:
Files can be written
*/

$filename = "test.txt";           //definition file
If is_readable ($ filename))          //to determine if the file is readable by
{
  echo "File readable";           //output Information
}
else              //If the file is not readable
{
  echo "file is unreadable";          //output Information
}
/*
Output is similar to:
File readable
*/