PHP chmod() Function

Definition

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

Syntax

PHP chmod() Function has the following syntax.

Parameter

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

Returns

Returns TRUE on success and FALSE on failure.

Example

<?PHP//from  w  w w.java 2s.com
//sets the file to readable, writable, and executable by all users
chmod("/var/www/myfile.txt", 0777);

//sets the file to readable, writable, and executable by owner, 
//and just readable and writable by everyone else.

chmod("/var/www/myfile.txt", 0755);

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

?>