生成無重複

Question

我想生成6位隨機數，並檢查它是否在表中，如果存在的話產生了另外6位隨機數，再等等.. wriiten代碼如下檢查隨機數，

$querySel1=mysqli_query($connect, "select dynamic_email_id from logis_contacts"); 
while($row = mysqli_fetch_row($querySel1)){ 
    $dynamic_id[] = $row[0];    
} 
$number = mt_rand(100000, 999999); 
dynamicEmailId($number, $dynamic_id); 


function dynamicEmailId($number, $dynamic_id){ 
    if(in_array($number, $dynamic_id)){  
    $new = mt_rand(100000, 999999); 
    dynamicEmailId($new, $dynamic_id);// here i am confused 
    } 
    else { 
    echo $number; 
    } 
} 

請提出一個更好的方式來實現這一目標

Answer 1

*它的罰款請

function generateUniqueId($number,$fetchArray) { 
    if (!in_array($number,$fetchArray)) { 
    return $number; 
    } 
    else { 
    $newNumber = mt_rand(100000, 999999); 
    return generateUniqueId($newNumber, $fetchArray); 
    } 
}