PHP/Math/rand
Содержание
Dice Rolling Simulator
<source lang="html4strict">
<?php function roll_dice($number, $sides, $values = false) {
$dice = array();
for ($i = 0; $i < $number; $i++) {
$dice[] = rand(1, $sides);
}
if ($values) {
return $dice;
} else {
return array_sum($dice);
}
} $roll_3d6 = roll_dice(3, 6);
echo "Dice roll = {$roll_3d6}\n";
$rm_stats = roll_dice(10, 100, true);
print_r($rm_stats);
echo "";
?>
</source>
Generate random numbers (integer values) between 0 and MAX_RAND by calling rand() or mt_rand() without any arguments
<source lang="html4strict">
<?php echo "rand() = " . rand() . "\n"; echo "mt_rand() = " . mt_rand() . "\n"; ?>
</source>
int rand ( [int min, int max] ) returns random numbers
<source lang="html4strict">
<?
$random = rand( ); $randrange = rand(1,10);
?>
</source>
Random Images
<source lang="html4strict">
<html>
<head>
<title>Random Images</title>
</head>
<body bgcolor = "#000000" >
<?php
srand( microtime() * 1000000 );
$num = rand( 1, 4 );
switch( $num )
{
case 1 : $car = "a.jpg"; $url="a.php"; break;
case 2 : $car = "f.jpg"; $url="f.php"; break;
case 3 : $car = "j.jpg"; $url = "j.php"; break;
case 4 : $car = "p.jpg"; $url = "p.php"; break;
}
$banner = "<a href=\"$url\"> ";
$banner.= "<img src=\"$car\" ";
$banner.= "width=\"380\" height=\"110\" border=\"0\" >";
$banner.="</a>";
echo( $banner );
?>
</body>
</html>
</source>
Random Numbers
<source lang="html4strict">
<html>
<head> <title>Random Numbers</title> </head> <body> <?php srand( microtime() * 1000000 ); $num = rand( 1, 100 ); echo( "Microtime:" . microtime() . "
"); echo( "A random number: " . $num . "
"); $num = rand( 1, 100 ); echo( "Another random number:" . $num ); ?> </body>
</html>
</source>
