PHP chmod() Function

chmod(file,mode)

The mode parameter consists of four numbers:

• The first number is always zero
• The second number specifies permissions for the owner
• The third number specifies permissions for the owner's user group
• The fourth number specifies permissions for everybody else

Possible values (to set multiple permissions, add up the following numbers):

• 1 = execute permissions
• 2 = write permissions
• 4 = read permissions

<?php
// Read and write for owner, nothing for everybody else
chmod("test.txt",0600);

// Read and write for owner, read for everybody else
chmod("test.txt",0644);

// Everything for owner, read and execute for everybody else
chmod("test.txt",0755);

// Everything for owner, read for owner's group
chmod("test.txt",0740);
?>