PHP chmod() Function
The PHP chmod() function attempts to change permissions of the specified file and returns true on success or false on failure.
Note: The current user is the user under which PHP runs. The file permissions can be changed only by user who owns the file on most the systems.
Syntax
chmod(filename, permissions)
Parameters
filename |
Required. Specify the file to set permissions on. |
permissions |
Required. Specify the new permissions, given as an octal value (starting with 0). The parameter consists of four numbers:
|
Return Value
Returns true on success or false on failure.
Example: chmod() example
Lets assume that we have a file called test.txt in the current working directory. The example below describes how to use chmod() function to change permissions for this file.
<?php
$file = "test.txt";
//read and write for owner only
if(chmod("test.txt",0600))
echo "Permissions is successfully set to 0600 \n";
//read and write for owner, read for everybody else
if(chmod("test.txt",0644))
echo "Permissions is successfully set to 0644 \n";
//everything for owner, read and execute for everybody else
if(chmod("test.txt",0755))
echo "Permissions is successfully set to 0755 \n";
//everything for owner, read for owner's group
if(chmod("test.txt",0740))
echo "Permissions is successfully set to 0740 \n";
?>
The output of the above code will be:
Permissions is successfully set to 0600 Permissions is successfully set to 0644 Permissions is successfully set to 0755 Permissions is successfully set to 0740
❮ PHP Filesystem Reference
