The chmod() function changes the file mode. It returns TRUE on success and FALSE on failure.
Syntax
chmod($file_path, file_mode)
Parameters
file_path − Set the path of file or directory to be checked for existence. Required.
file_mode − Set the mode with values. The description of file_mode parameter is shown below
File Mode parameter
Set the file mode with the following four values.
- zero
- permission for owner
- permission for the owner’s user group
- permissions for rest
The following are the values to set multiple permissions. You need to add the following numbers −
- 1 = execute permissions
- 2 = write permissions
- 4 = read permissions
Return
The file_exists() method returns.
- True, on success
- False, on failure
Example
The following is an example that changes the mode for file “one.txt”. This sets read and write permission for owner, nothing for everybody else.
<?php
// Setting mode for file
// Read and write permission for owner, nothing for everybody else
chmod("one.txt",0600);
?>Let us see another example that changes the file mode for “two.txt”. This sets read and write permission for owner, read for everybody else.
<?php
// Setting mode for file
// Read and write permission for owner, read for everybody else
chmod("two.txt",0644);
?>Let us see another example that changes the file mode for “three.txt”. This sets all the permissions for owner, read and execute for everybody else.
<?php
// Setting mode for file
// All the permissions for owner, read and execute for everybody else
chmod("three.txt",0755);
?>Let us see another example that changes the file mode for “four.txt”. This sets all the permissions for owner, read for owner's group.
<?php
// Setting mode for file
// All the permissions for owner, read for owner's group
chmod("four.txt",0740);
?>Let us see another example that changes the file mode for “five.txt”. This sets all the permissions for owner, read and execute for owner's group.
<?php
// Setting mode for file
// All the permissions for owner, read and execute for owner's group
chmod("five.txt",0740);
?>