Introduction to the PHP chmod () function

php chmod function can change the access rights of files and folders, but when using the prompt warning, as follows:

Warning:chmod () [Function.chmod]: Operation not permitted in/export/mytest/chmodtest.php on line 5

The modified folder has all the parent folder's access permissions changed to the 777,chmod function does not modify the access permissions of the folder at all, what is the reason? *nix just let all the files under the Web root belong to Apache run user all right, fake Apache user with Apache group running httpd Then

Chown-r Apache.apache/path to documentroot/

Win has all permissions to the IIS running user to DocumentRoot.

The chmod () function changes the file mode. returns TRUE if successful, otherwise FALSE.

Grammar

chmod (File,mode)

Parameters	Description
File	Necessary. Specifies the documents to be inspected.
Mode	Optional. Specify the new permissions. The mode parameter consists of 4 numbers: The first number is always 0. The second number specifies the owner's permissions The second number specifies the permissions of the user group to which the owner is a member The fourth number stipulates the rights of all other persons Possible values (if you want to set multiple permissions, make a total of the following numbers): 1-Execute Permissions 2-Write permissions 4-Read Permissions

PHP chmod () function instance

The <?php//owner can read and write, others do not have any permissions chmod ("Test.txt", 0600);//The owner can read and write, the other person is readable chmod ("test.txt", 0644);//owner has all permissions, All other persons can read and execute chmod ("Test.txt", 0755);//owner has all permissions, the owner of the group is readable chmod ("test.txt", 0740); >