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PHP Directory is_dir() Function (With Examples)
In this tutorial, we will learn about the PHP is_dir() function with its usage, syntax, parameters, return value, and examples.
By IncludeHelp Last updated : December 31, 2023
PHP is_dir() function
The full form of is_dir is "Is Directory", the function is_dir() is used to check whether a file system is a directory or whether a directory exists or not.
Syntax
The syntax of the is_dir() function:
is_dir(directory);
Parameters
The parameters of the is_dir() function:
- directory – Directory name (or path) to be checked whether it exists or not.
Return Value
It returns a Boolean value, "TRUE" (1) – if directory exists or "FALSE" (null) – if the directory does not exist.
PHP is_dir() Function Example
PHP code to check whether a directory exists or not.
<?php
//creating directories
mkdir("/home/folder1");
mkdir("/home/folder2");
mkdir("/home/folder3");
//checking directories are exist or not
echo is_dir("/home/folder1") . "<br/>";
echo is_dir("/home/folder2") . "<br/>";
echo is_dir("/home/folder3") . "<br/>";
echo is_dir("/home/folder4") . "<br/>";
//checking through the conditions
if (is_dir("/home/folder1")) {
echo "/home/folder1 exists" . "<br/>";
} else {
echo "/home/folder1 does not exist" . "<br/>";
}
if (is_dir("/home/folder2")) {
echo "/home/folder2 exists" . "<br/>";
} else {
echo "/home/folder2 does not exist" . "<br/>";
}
if (is_dir("/home/folder3")) {
echo "/home/folder3 exists" . "<br/>";
} else {
echo "/home/folder3 does not exist" . "<br/>";
}
if (is_dir("/home/folder4")) {
echo "/home/folder4 exists" . "<br/>";
} else {
echo "/home/folder4 does not exist" . "<br/>";
}
?>
Output
The output of the above example is:
1
1
1
/home/folder1 exists
/home/folder2 exists
/home/folder3 exists
/home/folder4 does not exist
To understand the above example, you should have the basic knowledge of the following PHP topics:
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