Php checks whether a file exists in the directory

Today, when writing and uploading an image as the cover, we want to avoid repeated album art uploads. Cover image settings are messy. Baidu has the code to judge whether the folder is empty.

The code is as follows:	Copy code
<? Php $ Dir = opendir ('1 '); $ Ml = 0; While ($ file = readdir ($ dir ))! = False) {$ Cs = $ ml ++; If ($ cs = "2") {echo "has Files ";}   } Closedir ($ dir ); ?>

Obtain the directory of folder 1. Because the function will retrieve the... and the upper-level directories. In this way, the result of Loop 1 is that the folder is empty. If the number of loops reaches 2, the files in the directory will be displayed.

Example

The code is as follows:	Copy code
<? Php Function is_empty_dir ($ dir_path) { If (! Is_dir ($ dir_path )){ Echo "folder does not exist "; Return true; // www.111cn. Net } $ Dir = opendir ($ dir_path ); $ Is_empty = true; While ($ file = readdir ($ dir )){ If ($ file = '.' | $ file = '..') continue; $ Is_empty = false; Break; } Closedir ($ dir ); Return $ is_empty; } ?>

Example

The code is as follows:

Copy code

<? Php $ Root = dirname (_ FILE __); $ Root = str_replace ("\", "/", $ root ); $ Path = $ root. '/test /'; $ Isempty = file_exit (); // Check whether the directory is empty Function file_exit ($ filelastname = ''){ Global $ path; If ($ filelastname! = ''){ $ Handle = opendir ($ path. $ filelastname ); } Else { $ Handle = opendir ($ path ); } While (false! ==( $ File = readdir ($ handle ))){ If ($ file = '.' | $ file = '..'){ Continue;    } $ File_array [] = $ file; } If ($ file_array = NULL) {// no file Closedir ($ handle ); Return false; } Closedir ($ handle ); Return true; // A file exists. } ?>