What is the is_dir() function in PHP?
The is_dir() function in PHP checks whether the given filename is a directory.
Syntax
is_dir(string: $name):bool
Parameters
name: This specifies the path to the file we want to check.
Return value
is_dir() returns true if the provided filename exists and is also a directory. Otherwise, it returns false.
Code
The following code shows the use of the is_dir() function.
main.php
test.txt
<?php$file = "test.txt";mkdir("documents");if(is_dir($file)){echo ("$file is a directory");}else{echo ("$file is not a directory");}echo "\n";if(is_dir("documents")){echo ("Documents is a directory");}else{echo ("Documents is not a directory");}?>
Explanation
In the code above, the file test.txt is passed to the function. Since it is not a directory, is_dir() returns false.
The mkdir function makes a directory named documents and returns true when it is checked using the is_dir() function.
This function produces cache output. We have to clear the cache by using the
clearstatcache()function.
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