Syntax:string DirectoryIterator::key (void)
Parameters:This function takes no parameters.
Return value:This function returns the key for the current DirectoryIterator item.The following programs illustrate PHP DirectoryIterator::key() function:
Program 1:
// Create an Iterator directory $directory = new DirectoryIterator (dirname ( __ FILE__ ));
// Loop for each directory item foreach ( $directory as $dir ) { // Show key and file name echo $dir -> key(). "= >" . $dir -> getFilename(). "
" ; }
?> Output:0 = > ... 1 = > .. 2 = > applications.html 3 = > bitnami.css 4 = > dashboard 5 = > favicon.ico 6 = > engineer.PNG 7 = > gfg.php 8 = > img 9 = > index.php 10 = > Sublime Text Build 3211 x64 Setup.exe 11 = > webalizer 12 = > xampp
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()) { // Show key and file name echo $directory -> key(). "= >" . $directory -> getFilename(). "
" ; } // Move to next item $directory -> next(); }
?> Output:0 = > ... 1 = > .. 4 = > dashboard 8 = > img 11 = > webalizer 12 = > xampp
Note . The output of this function depends on the contents of the server folder.Link: https : //www.php.net/manual/en/directoryiterator.key.php
