PHP | is_writable() Function

PHP is_writable() 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 is_writable() Function.

The is_writable() function checks whether the specified file is writable.


Following below is the syntax to use this function -

bool is_writable ( string $filename )

This built-in PHP function returns true if the filename exists and writable. The filename argument may be a directory name that lets us to check if the directory is writable.

Return Value

This built-in PHP function returns true if the file is writable, otherwise it returns false.


Try out the below example -

   $file = "/PhpProject/php/phptest.txt";
   if(is_writable($file)) {
       echo ("$file is writable");
   } else {
       echo ("$file is not writable");


When the above code is executed, it will produce the following result -

/PhpProject/php/phptest.txt is writable

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 is_writeable() Function.

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