PHP DirectoryIterator isDir () function

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Syntax:
bool DirectoryIterator::isDir (void)
Parameters:This function takes no parameters.Return Value:This function returns TRUE if the directory exists, FALSE otherwise.The following programs illustrate the DirectoryIterator::isDir() function in PHP:Program 1:
// Create an Iterator directory $directory = new DirectoryIterator (dirname ( __ FILE__ ));
// Loop while the directory is valid while ( $directory -> valid()) { // Validate a catalog item if ( $directory -> isDir()) { $file = $directory -> current(); // Show file name and size echo $file -> getFilename(). "| Size:" . $directory -> getSize(). "< br >" ; } // Move to next item $directory -> next(); }
?>
Output:
. | Size: 4096 .. | Size: 12288 dashboard | Size: 4096 img | Size: 0 webalizer | Size: 0 xampp | Size: 0
Program 2:
// Create an Iterator directory $directory = new DirectoryIterator (dirname ( __ FILE__ ));
// Loop while the directory is valid while ( $directory -> valid()) { // Validate a catalog item if ( $directory -> isDir()) { $file = $directory -> current(); // Display the file name and last modified time echo $file -> getFilename(). "| MTime:" . $directory -> getMTime(). "< br >" ; } // Move to next item $directory -> next(); }
?>
Output:
. | MTime: 1574654324 .. | MTime: 1574540515 dashboard | MTime: 1574350724 img | MTime: 1574350724 webalizer | MTime: 1574350718 xampp | MTime: 1574350724
Note . The output of this function depends on the contents of the server folder.Link: https : //www.php.net/manual/en/directoryiterator.isdir.php

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PHP DirectoryIterator isDir () function dirname: Questions

os.path.dirname(__file__) returns empty

2 answers

I want to get the path of the current directory under which a .py file is executed.

For example a simple file D: est.py with code:

import os

print os.getcwd()
print os.path.basename(__file__)
print os.path.abspath(__file__)
print os.path.dirname(__file__)

It is weird that the output is:

D:
test.py
D:	est.py
EMPTY

I am expecting the same results from the getcwd() and path.dirname().

Given os.path.abspath = os.path.dirname + os.path.basename, why

os.path.dirname(__file__)

returns empty?

174

Answer #1

Because os.path.abspath = os.path.dirname + os.path.basename does not hold. we rather have

os.path.dirname(filename) + os.path.basename(filename) == filename

Both dirname() and basename() only split the passed filename into components without taking into account the current directory. If you want to also consider the current directory, you have to do so explicitly.

To get the dirname of the absolute path, use

os.path.dirname(os.path.abspath(__file__))

PHP DirectoryIterator isDir () function dirname: Questions

What is the difference between os.path.basename() and os.path.dirname()?

2 answers

What is the difference between os.path.basename() and os.path.dirname()?

I already searched for answers and read some links, but didn"t understand. Can anyone give a simple explanation?

158

Answer #1

Both functions use the os.path.split(path) function to split the pathname path into a pair; (head, tail).

The os.path.dirname(path) function returns the head of the path.

E.g.: The dirname of "/foo/bar/item" is "/foo/bar".

The os.path.basename(path) function returns the tail of the path.

E.g.: The basename of "/foo/bar/item" returns "item"

From: http://docs.python.org/3/library/os.path.html#os.path.basename

We hope this article has helped you to resolve the problem. Apart from PHP DirectoryIterator isDir () function, check other dirname-related topics.

Want to excel in Python? See our review of the best Python online courses 2022. If you are interested in Data Science, check also how to learn programming in R.

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Carlo Ungerschaft

Texas | 2022-11-26

getsize is always a bit confusing 😭 PHP DirectoryIterator isDir () function is not the only problem I encountered. I am just not quite sure it is the best method

Carlo Robinson

Texas | 2022-11-26

Thanks for explaining! I was stuck with PHP DirectoryIterator isDir () function for some hours, finally got it done 🤗. Checked yesterday, it works!

Carlo Danburry

Tallinn | 2022-11-26

isdir is always a bit confusing 😭 PHP DirectoryIterator isDir () function is not the only problem I encountered. Checked yesterday, it works!

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