Implementing a simple shuffling algorithm in php_PHP tutorial

As shown below:

Copy code The code is as follows:

/**
* Simple shuffling algorithm
* /

$card_num=54; //Number of cards
print_r(wash_card($card_num));

function wash_card($card_num)
{
$cards= $tmp=array();
for($i=0;$i<$card_num;$i++){
$tmp[$i]=$i;
}

for($i=0;$i<$card_num;$i++){
             $index=rand(0,$card_num-$i-1);                                          index];
unset($tmp[$index]);
$tmp=array_values($tmp);
}
return $cards;
}
?>

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