PHP | umask() Function

Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP umask() Function.

The built-in PHP umask() function changes the file permission for files. This PHP function sets the PHP's umask to mask & 0777 and returns the old umask. But if we call the umask() function without any arguments, it returns the current umask.

Syntax

Following below is the syntax to use this function -

int umask ([ int $mask ] )

READ: PHP | touch() Function

This built-in PHP function can set the PHP's umask to mask & 0777 and returns old umask. When PHP is being used as server module, the umask is restored when each request is finished.

Return Value

The PHP umask() function without arguments returns current mask. Else, an old umask is returned.

Example

Try out the below example -

<?php
   $old = umask(0);
   chmod("PhpProject/php/sample.txt", 0755);
   umask($old);

   //  Checking
   if($old != umask()) {
      echo "An error occurred while changing back the umask";
   }
?>

READ: PHP | pathinfo() Function

Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP unlink() Function.

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