How to use the PHP directory function

This article mainly and everyone to share the PHP directory function use method, hope to help everyone.

Create a Directory

1. mkdir: Try creating a new directory specified by pathname.

BOOL MkDir (string $pathname [, int $mode = 0777 [, bool $recursive = False [, resource $context]])

• Recursive creation is not supported by default:

• The third parameter writes true:

Tip: The second one is ignored in Windows and useful in Linux!

Delete Directory

2. RmDir: Try to delete the directory specified by DirName. The directory must be empty and have the appropriate permissions. Failure results in a e_warning level error.

BOOL RmDir (String $dirname [, Resource $context])

Tip: Do not allow deletion of non-empty directories

Get directory Contents

Opendir: Opens a directory handle that can be used for subsequent closedir (), Readdir (), and Rewinddir () calls.

Resource Opendir (String $path [, Resource $context])

Return value: Returns the resource of the directory handle if successful, and FALSE if it fails.

Readdir: Returns the file name of the next file in the directory. The file name is returned as a sort in the file system.

String Readdir ([resource $dir _handle])

Parameter $dir_handle : Resource of the directory handle, previously opened by Opendir ()

Return value: Success returns the file name or FALSE on failure

• With a handle, read a file (including files and subdirectories) from the directory, read one file at a time, and move the file pointer down!

• Note that the virtual directory exists under each directory . .. . Represents the current directory, and the parent directory.

With the loop structure, you can get the entire contents of the directory:

It is common to ignore . and ..

0 file names may be treated as false, so you need to use the all-unequal comparison operator to handle

Closedir: Closes the directory stream specified by Dir_handle. The stream must be opened previously by Opendir ().

void Closedir ([resource $dir _handle])

Rename: rename (move) a file or directory and rename the oldname to NewName.

BOOL Rename (string $oldname, String $newname [, Resource $context])

Create a Directory

1. mkdir: Try creating a new directory specified by pathname.

BOOL MkDir (string $pathname [, int $mode = 0777 [, bool $recursive = False [, resource $context]])

• Recursive creation is not supported by default:

• The third parameter writes true:

Tip: The second one is ignored in Windows and useful in Linux!

Delete Directory

2. RmDir: Try to delete the directory specified by DirName. The directory must be empty and have the appropriate permissions. Failure results in a e_warning level error.

BOOL RmDir (String $dirname [, Resource $context])

Tip: Do not allow deletion of non-empty directories

Get directory Contents

Opendir: Opens a directory handle that can be used for subsequent closedir (), Readdir (), and Rewinddir () calls.

Resource Opendir (String $path [, Resource $context])

Return value: Returns the resource of the directory handle if successful, and FALSE if it fails.

Readdir: Returns the file name of the next file in the directory. The file name is returned as a sort in the file system.

String Readdir ([resource $dir _handle])

Parameter $dir_handle : Resource of the directory handle, previously opened by Opendir ()

Return value: Success returns the file name or FALSE on failure

• With a handle, read a file (including files and subdirectories) from the directory, read one file at a time, and move the file pointer down!

• Note that the virtual directory exists under each directory . .. . Represents the current directory, and the parent directory.

With the loop structure, you can get the entire contents of the directory:

It is common to ignore . and ..

0 file names may be treated as false, so you need to use the all-unequal comparison operator to handle

Closedir: Closes the directory stream specified by Dir_handle. The stream must be opened previously by Opendir ().

void Closedir ([resource $dir _handle])

Rename: rename (move) a file or directory and rename the oldname to NewName.

BOOL Rename (string $oldname, String $newname [, Resource $context])