do while loop not working well php

I am trying to push values after they are being calculated to different arrays as you can see the min($arrival) being unset after it enters the while loop everything works fine for the first 3 arrivals ("1","1","1") but when it hits ("4") it does not go to the else statement since the ($minCC is not > 1) anymore i am not sure if there is something wrong with the if statement or the while loop i need help figuring out whats wrong. thanks in advance.

$alpha = ["A","B","C","D"];
$arrival = ["1","1","1","4"];
$cpu = ["10","2","2","4"];
$final = array(); //start + finish
$inCC = array(); //final cc of inline related to falp
$outCC = array(); //final cc of inline2
$falp = array(); // final a
$start = 0;

$tempc = array(); // => temp for leftc
$tempa = array(); // => temp for lefta

$leftc = array(); // =>merge inCC & outCC
$lefta = array(); // =>merge falp

$hashed = mysql_query("SELECT Alpha FROM fcfs", $connection);
while($row = mysql_fetch_assoc($hashed)){
    $hash[] = $row['Alpha'];
}
/////test
do{
$min = min($arrival);
$findmin = mysql_query("SELECT Alpha,CPU FROM fcfs WHERE Arrival='$min'", $connection);
while($fm = mysql_fetch_assoc($findmin)){
    $ALPHA[] = $fm['Alpha'];
    $minCC[] = $fm['CPU'];
}

/*while(count($minCC) > 0){*/
$keys = array_keys($arrival, $min);
    foreach($keys as $k)
    {
        unset($arrival[$k]);
    }
$min2 = min($arrival);
$diff = $min2 - $min;

    if(count($minCC) > 1){ /// else fasfas el min of mincc
        for($i=0; $i<$diff; $i++){
            if($minCC[$i] == 1){
                array_push($inCC, $minCC[$i]);
                array_push($falp, $ALPHA[$i]);
                unset($minCC[$i]);
                unset($ALPHA[$i]);
                unset($hash[$i]);
            }else{
                array_push($inCC, 1);
                array_push($tempc, ($minCC[$i] - 1));
                array_push($tempa, $ALPHA[$i]);
                unset($minCC[$i]);
                unset($ALPHA[$i]);
                unset($hash[$i]);
            }
        }
    }else{
        array_push($inCC, $minCC[0]);
        array_push($falp, $ALPHA[0]);
        unset($minCC[0]);
        unset($ALPHA[0]);
        unset($hash[0]);
    }
}while(count($hash) > 0); <=== think this goes infinite and page stop working


/* testing each array */
print_r($hash);
echo '<br>';
print_r($tempc);
echo '<br>';
print_r($tempa);
echo '<br>';
print_r($inCC);