Interpreting the specific code implementation of PHP computing page execution time _ PHP Tutorial

Describe the specific code implementation of PHP computing page execution time. The code for calculating the page execution time using PHP is as follows :? Phpclassruntime {var $ StartTime0; var $ StopTime0; functionget_microtime () {list ($ usec, $ sec) explode (, mi throughThe code for calculating the page execution time in PHP is as follows:

 
 

  
  
 Php 
  
  
Class runtime
  
  
{
  
  
Var $StartTime=0;
  
  
Var $StopTime=0;
  
  
 
  
  
Function get_microtime ()
  
  
{
  
  
List ($ usec, $ sec) = explode ('', microtime ());
  
  
Return (float) $ usec + (float) $ sec );
  
  
}
  
  
 
  
  
Function start ()
  
  
{
  
  
$ This->StartTime= $ This->Get_microtime ();
  
  
}
  
  
 
  
  
Function stop ()
  
  
{
  
  
$ This->StopTime= $ This->Get_microtime ();
  
  
}
  
  
 
  
  
Function spent ()
  
  
{
  
  
Return round ($ this->StopTime-$ this->StartTime) * 1000, 1 );
  
  
}
  
  
 
  
  
}
  
  
 
  
  
 
  
  
// Example
  
  
$Runtime=NewRuntime;
  
  
$ Runtime->Start ();
  
  
 
  
  
// Start your code
  
  
 
  
  
$A=0;
  
  
For ($I=0; $ I<1000000; $ I ++)
  
  
{
  
  
$ A + = $ I;
  
  
}
  
  
 
  
  
// Your code ends
  
  
 
  
  
$ Runtime->Stop ();
  
  
Echo "page Execution time:". $ runtime->Spent (). "millisecond ";
  
  
 
  
  
?> 
 
 

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The code used to calculate the page execution time in PHP is as follows :? Php classruntime {var $ StartTime = 0; var $ StopTime = 0; functionget_microtime () {list ($ usec, $ sec) = explode ('', mi...