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PHP File Permission


The chmod() function changes permissions of the specified file.

chmod(file, mode)

Parameter Values

Parameter Description
file Required. Specifies the path to the file
mode Required. Specifies the new permissions.

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