Detailed explanation of PHP Directory function_PHP tutorial

Predefined constants:

DIRECTORY_SEPARATOR (string): Directory separator

PATH_SEPARATOR (string): path separator

bool chdir ( string $directory ) — change directory

Copy code The code is as follows:

echo getcwd() . "n";
chdir('public_html');
echo getcwd() . "n";

bool chroot ( string $directory ) — Changing the root directory is only possible if the system supports it and is running the CLI, CGI or embedded SAPI version.

dir::dir (string $directory)—directory class, there are three methods available: read, rewind (redirect the position pointer inside the file to the beginning of a data stream) and close

Copy code The code is as follows:

$d = dir("E:/work/html");
foreach($d as $k=>$v){
echo $k.'->' .$v. '
';
}
while(false ! == ($entry = $d->read())){
echo $entry."
";
}
$d->close();

void closedir ( resource $dir_handle ) — Close the directory handle

Copy code The code is as follows:

$dir = "/etc/php5/";

if (is_dir($dir)) {
if ($dh = opendir($dir)){
$directory = readdir($dh);
closedir($dh);
}
}

string getcwd ( void )— Get the current working directory

resource opendir ( string $path [, resource $context ] ) — Open directory handle

string readdir ( resource $dir_handle ) — Read an entry from a directory handle

Copy code The code is as follows:

if ($handle = opendir('/path/to/files')) {
echo "Directory handle: $handlen";
echo "Files:n";
while (false !== ($file = readdir($handle))) {
echo "$filen ";
}
closedir($handle);
}

void rewinddir ( resource $dir_handle ) — Resets the directory stream specified by dir_handle to the beginning of the directory

array scandir ( string $directory [, int $sorting_order [, resource $context ]] ) — List files and directories in the specified path

Copy code The code is as follows:

$dir = '/tmp';
$files1 = scandir($dir );
$files2 = scandir($dir, 1);
print_r($files1);
print_r($files2);

http://www.bkjia.com/PHPjc/326745.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/326745.htmlTechArticlePredefined constants: DIRECTORY_SEPARATOR (string): Directory separator PATH_SEPARATOR (string): Path separator bool chdir (string $directory )—The code to change the directory copy code is as follows...