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PHP | umask() Function

PHP umask() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP umask() Function.

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


Following below is the syntax to use this function -

int umask ([ int $mask ] )

This function can set the 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 umask() function without arguments returns current mask. Else, an old umask is returned.


Try out the below example -

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

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

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

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