Directory functions in PHP | Learning Curve- Perfect Tutorial for the beginers

chdir-Change directory
chroot-change the root directory
closedir- Close directory handle
dir-Return an instance of the directory class
getcwd-gets the current working directory
opendir-open directory handle
readdir-read entry from the directory handle.
rewinddir-Rewind directory handle
scandir-list files and directories inside the specified path.

chdir and getcwd:

See the below example

 <?
  
    echo getcwd()."\n";

    chdir('mydoubts');

    echo getcwd()."\n";

    ?>

echo getcwd()."\n";

chdir('mydoubts');

echo getcwd()."\n";

Above example will output like below

/home/vasanthan
/home/vasanthan/mydoubts

chroot-change the root directory. it will change the current directory to ‘/’

Example:

 <?


	chroot("/data/vasanthan/mydoubts/");
	echo getcwd();

  
  ?>

chroot("/data/vasanthan/mydoubts/");

echo getcwd();

Ouput as below

Opendir-Open a directory handle

it returns directory handle resource on success ,or false on failure

Examples

<?php
$dir = "/vasanthan/mydoubts/";


if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        while (($file = readdir($dh)) !== false) {
            echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";
        }
        closedir($dh);
    }
}
?>

<?php

$dir = "/vasanthan/mydoubts/";

if (is_dir($dir)) {

if ($dh = opendir($dir)) {

while (($file = readdir($dh)) !== false) {

echo "filename: $file : filetype: " . filetype($dir . $file) . "\n";

}

closedir($dh);

}

scandir-list files and directories inside the specified path.

Examples:

<?php
$dir    = 'C:/xampp/htdocs/test';
$files1 = scandir($dir);
print_r($files1);
?>

<?php

$dir = 'C:/xampp/htdocs/test';

$files1 = scandir($dir);

print_r($files1);

ouput will be like below

Array (
[0] => .
[1] => ..
[2] => index.php
)

tag:directory function in php,scandir example in php,opendir,chroot,getcwd

2. Sample script for reading csv file?

<?
$myfile='hello.csv';
$filehandler=fopen($myfile,'r');
while(!feof($filehandler))
{

$csvcontent[]=fgetcsv($filehandler,1024);

}
fclose($filehandler);
?>

$myfile='hello.csv';

$filehandler=fopen($myfile,'r');

while(!feof($filehandler))

{

$csvcontent[]=fgetcsv($filehandler,1024);

}

fclose($filehandler);

print_r($csvcontent);