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PHP | set_file_buffer() Function

PHP set_file_buffer() 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 set_file_buffer() Function.

The built-in PHP set_file_buffer() function sets the buffer size of an open file. The output using the built-in PHP fwrite() function is normally buffered at 8k. So, if two processes write to the same file, each can write up to 8k before pausing and allowing others to write. If the buffer is 0, the write operations are unbuffered, which means that the first write process can be completed before allowing other processes to write.


Following below is the syntax to use this function -

set_file_buffer(file, buffer)

This function is an alias of the built-in PHP stream_set_write_buffer() function.

Return Value

This built-in function returns 0 on success, else it returns EOF.


Try out the below example -

   $file = fopen("/PhpProject/sample.txt", "w");
   if ($file) {
      set_file_buffer($file, 0);
      fwrite($file, "Hello World!");

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 stat() Function.

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