opendir, readdir and closedir (PHP operating directories and files)_PHP tutorial

opendir, readdir and closedir (PHP operating directories and files) This is a simple introductory tutorial for PHP directory and file operations. We mainly talk about the use of the three functions opendir, readdir and closedir. ​

opendir, readdir and closedir (php tutorial operating directories and files)
This is a simple introductory tutorial for PHP directory and file operations. We mainly talk about the use of three functions: opendir, readdir and closedir.
*/

$dir = "d:www.bkjia.com";

//Open the directory $dir and assign the directory handle to the variable $dh
if($dh = opendir($dir))
{
//Through the while loop, use the function readdir to get the file name
While(($file_name = readdir($dh)) !== false)
{
echo "file name: ".$file_name;
echo "
";
echo "
";
}
 
//After processing is completed, close the directory handle $dh
closedir($dh);
}

/*
opendir definition and usage
The opendir() function opens a directory handle and can be used by closedir(), readdir() and rewinddir().

If successful, this function returns a directory stream, otherwise it returns false and an error. You can hide error output by prepending "@" to the function name.

Grammar
opendir(path,context)

readdir definition and usage
The readdir() function returns the entry in the directory handle opened by opendir().

If successful, the function returns a file name, otherwise it returns false.

Grammar
readdir(dir_stream)

The closedir() function closes the directory handle opened by the opendir() function.

Grammar
closedir(dir_stream)

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