PHP | DirectoryIterator isReadable() Function

The DirectoryIterator::isReadable() function is an inbuilt function in PHP which is used to check the current DirectoryIterator item is readable or not.

Syntax:

bool DirectoryIterator::isReadable( void )

Parameters: This function does not accept any parameters.

Return Value: This function returns TRUE if the file is readable, otherwise returns FALSE.

Below programs illustrate the DirectoryIterator::isReadable() 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) {

    // Check for readable element
    if($dir->isReadable()) {

        // Display the filename
        echo $dir->getFilename() . "<br>";
    }
}

?>

Output:

.
..
applications.html
bitnami.css
dashboard
favicon.ico
geeks.PNG
gfg.php
img
index.php
Sublime Text Build 3211 x64 Setup.exe
webalizer
xampp

Program 2:

<?php

// Create a directory Iterator
$directory = new DirectoryIterator(dirname(__FILE__));

// Loop runs while element is valid
while ($directory->valid()) {

    // Check for readable element
    if($directory->isReadable()) {

        // Display the filename
        echo $directory->getFilename() . "<br>";
    }

    // Move to the next element
    $directory->next();
}

?>

Output:

.
..
applications.html
bitnami.css
dashboard
favicon.ico
geeks.PNG
gfg.php
img
index.php
Sublime Text Build 3211 x64 Setup.exe
webalizer
xampp

Note: The output of this function depends on the content of server folder.