PHP set_file_buffer () instance tutorial

PHP set_file_buffer () instance tutorial

Definition and usage
The set_file_buffer () function sets an open file for the buffer size.

The output uses fwrite () normally in the 8 K buffer. Therefore, if two processes write to the same file, each write will be paused before the 8K action and allow others to write to us. If the buffer is 0, the write operation is not buffered (that is, the first write process will be completed before it is allowed, and other processes write ).

This function returns 0 successfully. Otherwise, it returns the EOF.

Syntax

set_file_buffer(file,buffer)

 

  

   

    
Parameter
    
Description
   
   

    
file
    
Required. Specifies the open file
   
   

    
buffer
    
Required. Specifies the buffer size in bytes
   
  
 

Tips and instructions
Tip: this function is an alias stream_set_write_buffer ().




For example
Create a non-buffered stream:
<?php$file = fopen("test.txt","w");if ($file)  {  set_file_buffer($file,0);  fwrite($file,"Hello World. Testing!");  fclose($file);  }?>