PHP | ftruncate() Function

PHP ftruncate() 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 ftruncate() Function.

The built-in PHP ftruncate() function truncates an open file to a specified length.


Following below is the syntax to use this function -

bool ftruncate ( resource $handle , int $size )

This built-in PHP function can take the filepointer, handle, and truncate the file to length size.

Return Value

This built-in function returns true on success, or false on failure.


Try out the below example -

   //check filesize
   echo filesize("/PhpProject/sample.txt");
   echo "\n";
   $file = fopen("/PhpProject/sample.txt", "a+");
   ftruncate($file, 100);
   //Clear cache and check filesize again
   echo filesize("/PhpProject/sample.txt");


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


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

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