19c03-2.php

介绍PHP5的给类型函数应用

<?php
// Let's test our timing functionality, first include the file:
//require 'timer.php';
require '19c03-1.php';

// Let's generate a hundred thousand random numbers
foreach(range(1,100000) as $r) {
	rand();
}

// Now check how long that took.
_timer();

// Generate one SHA hash, based upon the last generated number:
sha1($r);

// Did that take very long?
_timer();

// Let's create a function that will do some work for us:
function do_it() {
	// Immediately start a timer
	_timer();
	
	// Now just sleep for 3 seconds
	sleep(3);
}

// Now call the function:
do_it();

// Then time one last time:
_timer();

// Now generate the text results, and output them - Will be similar to:
// Timing Results
// 0.00000 secs - File: 19c03-1.php - Line: 28 - Calling Function: require
// 0.24862 secs - File: 19c03-2.php - Line: 12
// 0.00011 secs - File: 19c03-2.php - Line: 18
// 0.00005 secs - File: 19c03-2.php - Line: 23 - Calling Function: do_it
// 2.98948 secs - File: 19c03-2.php - Line: 33
$output = _timer_text();
echo "<pre>{$output}</pre>\n";
?>