array_rand () takes a random value without ever being able to go back in its choice of random value.
A simple example:
I decide to mix an array of 10 entries to retrieve 3 values. This choice will give increasing and random values.
$myarray = range(1,10);
$pm = array_rand($myarray,3);
// $pm return array(0->0,1->6,2->8)
But if I decide to shuffle an array of 10 entries to get 10 entries, array_rand () will choose to assign a value to each return value and therefore the return array will not be random.
$gm = array_rand($myarray,count($myarray));
// $gm not random array(0->0,1->1,2->2,3->3,4->4,5->5,6->6,7->7,8->8,9->9)
The easiest way to have a truly random value:
either use array_rand () in a loop of 1 value at a time
$deg = range(-60,60);
$size = range(16,64);
$color = ["blue","red","green","pink","orange","purple","grey","darkgreen","darkkhaki"];
$i = 0;
$longueur = 10;
do{
++$i;
printf("<span style='transform: rotateZ(%ddeg); display: inline-block;font-size: %spx; color:%s'>%s</span>",
$deg[array_rand($deg)],
$size[array_rand($size)],
$color[array_rand($color)],
$alnum[array_rand($alnum)]);
}while($i < $longueur);
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or simply use shuffle () to shuffle the array really randomly.
