I want to generate an array with random numbers. I don't want the same value to appear twice in the array. I want all five values to be unique. How would I do this?
$rand1 = rand(1, 50);
$rand2 = rand(1, 50);
$rand3 = rand(1, 50);
$rand4 = rand(1, 50);
$rand5 = rand(1, 50);
$input = array($rand1,$rand2,$rand3,$rand4,$rand5);
print_r($input);
$total = 10; // total random numbers to create
$randoms = array();
for($i=0;$i<=$total;$i++)
{
$randomNumber = rand(1,50);
while(in_array($randomNumber,$randoms)) {
$randomNumber = rand(1,50);
}
$randoms[] = $randomNumber;
}
var_dump($randoms);
$x=0;
$rand=array();
while ($x<5) {
$r=rand(1, 50);
if(in_array($r, $rand)){
}else{
$rand[] = $r;
$x++;
}
}
var_dump($rand);
Try this:
$a = array();
for($i=0;$i<5;$i++){
$rand1=rand(1, 5);
while(in_array( $rand1,$a)){
$rand1=rand(1, 5);
}
$a[$i] = $rand1;
}
print_r($a);
Demo: https://eval.in/101433
demo OUTPUT:
Array
(
[0] => 2
[1] => 1
[2] => 4
[3] => 5
[4] => 3
)
I have this idea... there should be better ideas, but I think this one:
$rand1 = rand(1, 50);
do{
$rand2 = rand(1, 50);
}while($rand2==$rand1);
do{
$rand3 = rand(1, 50);
}while($rand3==$rand2 || $rand3==$rand1);
do{
$rand4 = rand(1, 50);
}while($rand4==$rand3 || $rand4==$rand2 || $rand4==$rand1);
do{
$rand5 = rand(1, 50);
}while($rand5==$rand4 || $rand5==$rand3 || $rand5==$rand2 || $rand5==$rand1);
$input = array($rand1,$rand2,$rand3,$rand4,$rand5); print_r($input);