[PHP] PHP creates the specified directories and files

A few days ago to see someone asked how to create a file in the PHP environment under the specified directory, just their recent study, after a test, finally the results, posted out to share with you.
Directory structure:
The file where the code is located wwwroot/mydir/test/test.php
Create directory: Create a directory testjiang123 under wwwroot/mydir/.
Create file: Create a file test.html under wwwroot/mydir/testjiang123/.

2. Create a folder
   
4. $username = "testjiang123";
   
6. $dir = ". /mydir/". $username;
   
8. function Createdir ($dir)
   
10. {
    
12. if (file_exists ($dir) && Is_dir ($dir)) {
    
14. }
    
16. else{
    
18. mkdir ($dir, 0777);
    
20. }
    
22. Creat_file ($dir);
    
24. }
    
26. Create a file
    
28. 
    
30. function Creat_file ($path) {
    
32. $sFile = "test.html";
    
34. $var _content= "File contents";
    
36. 
    
38. if (File_exists ($path. " /". $sFile)) {
    
40. Creat_file ();
    
42. } else {
    
44. $fp = fopen ($path. " /". $sFile," w ");
    
46. Fwrite ($fp, $var _content);
    
48. Fclose ($FP);
    
50. }
    
52. return $sFile;
    
54. }
    
56. 
    
58. Createdir ($dir);
    
60. A PHP copy function is also added here, copy the mytest.php in the current directory to the directory you just created, and rename it to the directory name +_mytest.php
    
62. copy ("mytest.php", $dir. " /". $username." _mytest.php ");