PHP fflush Function

Definition :

The fflush() function in PHP is an inbuilt function which is used to write all the buffered output to an open file. The fflush() function forces a write of all buffered output to the resource pointed to by the file handle. 

   fflush(file)

Errors And Exception:

1. The fflush() function results in errors if the file pointer is not valid.
2. The file pointed must be opened by fopen() or fsockopen() and closed by fclose().

Given below example Write all buffered output to the open file:

Output : Hello World write in the "demo.text" file