Teach you how to correctly use the PHP function flush () _php Tutorial

For just Learning

1, Flush: Flush the contents of the buffer, output.
function format: Flush ()

This function appears in PHP3, is a very efficient function, he has a very useful function is to refresh the browser cache. Let's take a very obvious example of how the PHP function flush () works.

Example 2.

 
 

  
  

  
< ? PHP
  
  

  
For ($i  =  1; $i  <= $i + +) print (""); 
  
  

  
This is a very important sentence, the structure of the cache
So that its content only reaches a certain size in order to output from the browser
  
  

  
In other words, if the contents of the cache do not reach
A certain size, it is not output before the program finishes executing. By
  
  

  
After testing, I found that the bottom of this size is
256 characters in length. This means that content received by the cache will be
  
  

  
The stream was sent out.
  
  

  
For ($J  =  1; $j  <= $j + +) {
  
  

  
echo $j. "
  
  

  
”;
  
  

  
Flush (); This will allow the cache to add new content
Be squeezed out and displayed on the browser
  
  

  
Sleep (1); Let the program "Sleep" for a second, will let
You can see the effect more clearly.
  
  

  
}
  
  

  
?>  
 
 

PHP2000 's newest PHP chat room is the use of this technology, unfortunately, the source code is not disclosed. Note: If you add Ob_implicit_flush () to the program's header to open the absolute refresh, you can no longer use the PHP function flush () in the program, the advantage is: improve efficiency!

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