PHP n non-repeating random number generation code_PHP tutorial

Copy code The code is as follows:

//range is to list 1 to 100 into an array
$numbers = range (1,100);
//shuffle shuffles the order of the array
shuffle ($numbers);
//array_slice takes a certain segment of the array
$no=6 ;
$result = array_slice($numbers,0,$no);
for ($i=0;$i<$no;$i++){
echo $result[$i]."
";
}
print_r($result);
?>

Copy code The code is as follows:

//range is to list 1 to 42 into an array
$numbers = range (1,42);
//shuffle will disrupt the order of the array.
shuffle ($numbers);
//array_slice takes a certain segment of the array
$result = array_slice($numbers,0,3);
print_r($result);

Method 2

Copy code The code is as follows:

$numbers = range (1,20);
srand ((float)microtime()*1000000);
shuffle ($numbers);
while (list (, $number) = each ($numbers)) {
echo "$number ";
}
?>

Method 3
Use PHP to randomly generate 5 unique values ​​between 1-20. How to do it

Copy code The code is as follows:

function NoRand($begin=0,$end=20 ,$limit=5){
$rand_array=range($begin,$end);
shuffle($rand_array);//Call the ready-made array random arrangement function
return array_slice($rand_array,0 ,$limit);//Intercept the first $limit
}
print_r(NoRand());
?>

or if not shuffle

Copy code The code is as follows:

$tmp=array();
while(count($tmp )<5){
$tmp[]=mt_rand(1,20);
$tmp=array_unique($tmp);
}
print join(',',$tmp) ;
?>

http://www.bkjia.com/PHPjc/320353.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/320353.htmlTechArticleCopy the code as follows: ?php //range is to list 1 to 100 into an array $numbers = range ( 1,100); //shuffle shuffles the order of the array shuffle ($numbers); //array_slice takes the array...