How to get all the file names in the directory and determine the files and directories in php

//Open the subdirectory common under the directory pic in the current directory.
$handler = opendir('pic/common');

2. Loop to read all files in the directory

/*where $filename = readdir($handler)
Every During the second loop, the read file name is assigned to $filename, $filename !== false.
Be sure to use !==, because if a file name is called '0', or something is considered false by the system, using != will stop the loop
*/
while( ($filename = readdir($ handler)) !== false )
{
 //Skip files named '.' and '..' in the linux directory
 if($filename != “.” && $filename != “..”)
 {
 //Output file name
 echo $filename;
 }
}

3. Close the directory

closedir($handler);

Two ,php determines file and directory functions Code:

//Check whether the target object logo.jpg in the upper-level directory is a file.
$checkResult = is_file(’../logo.jpg’);

Description: If the target object is a file, the system returns true, otherwise it returns false.

Code:

//Check whether the target object logo.jpg in the upper-level directory is a directory.
$checkResult = is_dir(’../logo.jpg’);

Description: If the target object is a directory system, return true, otherwise return false.