FileSystem Function in PHP: Part 12

Introduction

In this article I describe the PHP FileSystem functions is_dir, is_executable, is_file and is_link. To learn some other FileSystem functions, go to:

1. FileSystem Function in PHP: PART 1
2. FileSystem Function in PHP: PART 2
3. FileSystem Function in PHP: PART 3
4. FileSystem Function in PHP: PART 4
5. FileSystem Function in PHP: PART 5
6. FileSystem Function in PHP: PART 6
7. FileSystem Function in PHP: PART 7
8. FileSystem Function in PHP: PART 8
9. FileSystem Function in PHP: PART 9
10. FileSystem Function in PHP: PART 10
11. FileSystem Function in PHP: PART 11

PHP is_dir() Function

The PHP FileSystem is_dir function tells whether the filename is a directory and it returns true if the filename exists and is a directory, otherwise it returns false. 

Syntax

is_dir(file)

Parameter in is_dir function

The parameter of the function is:

Parameter	Description
file	It specifies the file to check.

Example

An example of the function is:

<?php
$file = "test.txt";
$file1 = "c:/";
if(is_dir($file))
{
echo ("$file is a directory");
}
else
{
echo ("$file is not a directory");
}
echo "</br>";
if(is_dir($file1))
{
echo ("$file1 is a directory");
}
else
{
echo ("$file1 is not a directory");
}
?>

Output



PHP is_executable() Function

The PHP FileSystem is_executable checks whether the specified file is executable or not and it returns true if the file name exists and is executable or false.

Syntax

is_executable(file)

Parameter in is_executable function

The parameter of the function is:

Parameter	Description
file	It specifies the file to check.

Example

An example of the function is:

<?php
$file = "install.exe";
if(is_executable($file))
{
echo ("$file is a executable");
}
else
{
echo ("$file is not a executable");
}
?>

Output

PHP is_file() Function

The PHP FileSystem is_file function checks whether the given file is a regular file and it returns true is the filename exists and is a regular file otherwise it returns false.

Syntax

is_file(file)

Parameter in is_file function

The parameter of the function is:

Parameter	Description
file	It specifies the file to check.

Example

An example of the function is:

<?php
$file = "test.txt";
if(is_file($file))
{
echo ("$file is a file");
}
else
{
echo ("$file is not a file");
}

?>

Output



PHP is_link() Function

The PHP FileSystem is_link function checks whether the specified file is a link and it returns true if the file name exists and is a  symbolic line otherwise it returns false.

Syntax

is_link(file)

Parameter in is_link function

The parameter of the function is:

Parameter	Description
file	It specifies the file to check.

Example

An example of the function is:

<?php
$file = "test.txt";
if(is_link($file))
{
echo ("$file is a link");
}
else
{
echo ("$file is not a link");
}
?>

Output