The DirectoryIterator::getExtension() function is an inbuilt function in PHP which is used to get the file extension.
Syntax:
string DirectoryIterator::getExtension( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns a string which contain the file extension, or an empty string if the file does not contain extension.
Below programs illustrate the DirectoryIterator::getExtension() function in PHP:
Program 1:
<?php   // Create a directory Iterator $directory = new DirectoryIterator(dirname(__FILE__));   // Loop runs for each element of directory foreach($directory as $dir) {           // Display the file extension     echo $dir->getExtension() . "<br>"; } ?> |
Output:
html css ico PNG php php
Note: Empty lines denote the folder which does not contain file extension.
Program 2:
<?php   // Create a directory Iterator $directory = new DirectoryIterator(dirname(__FILE__));   // Loop runs while directory is valid while ($directory->valid()) {           // Check if element is not directory     if (!$directory->isDir()) {                   // Display the extension         echo $directory->getExtension() . "<br>";     }       // Move to the next element     $directory->next(); } ?> |
Output:
html css ico PNG php php
Note: The output of this function depends on the content of server folder.
Reference: https://www.php.net/manual/en/directoryiterator.getextension.php
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