Hey, there's only one question left! -Php Tutorial

Hey, this is the only problem left !!! 7. compile a program using a custom function to calculate the running time of the page script. Please use the PHP language !!! Share To: Hey, this is the only problem left !!!
7. compile a program using a custom function to calculate the running time of the page script. Please use the PHP language !!!

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------ Solution --------------------
Custom write? Functions are available.
------ Solution --------------------

Function speed (){
Static $ t;
$ R = 0;
If ($ t) $ r = microtime (true)-$ t;
$ T = microtime (true );
Return $ r;
}
Speed ();
For ($ I = 0; I I <10000; $ I ++ ){
For ($ j = 0; $ j <1000; $ j ++ );
$ A = $ I;
}
Echo speed ();

Php5.4.18 is so fast that it cannot be simulated when the number of loops is less.
------ Solution --------------------
Record the time, minus one before and after, then the answer is OK.