Generate prime number using php | Learning Curve- Perfect Tutorial for the beginers

PHP code for generating prime number.IF a number is divisible by 1 and the number itself it is a prime number.in the below code $number_of_time_divide is greater than <3 its a prime number.Please see the code

 $count=0;
 $number=2;
 $number_of_prime_numbers=20;
 while($count<$number_of_prime_numbers)
 {

  $number_of_time_divide=0;
  for($i=1;$i<=$number;$i++)
  {
  if (($number%$i)==0) 
	{
	
	//check the number is divided by 1 and that number itself. if it is divisible by more than one number count will be above three.
	$number_of_time_divide++;
	} 
  }
  if($number_of_time_divide<3)
  {
    echo "number".$number; echo "<br>";$count++;
  }
  
 $number=$number+1;
 }

$count=0;

$number=2;

$number_of_prime_numbers=20;

while($count<$number_of_prime_numbers)

{

$number_of_time_divide=0;

for($i=1;$i<=$number;$i++)

{

if (($number%$i)==0)

{

//check the number is divided by 1 and that number itself. if it is divisible by more than one number count will be above three.

$number_of_time_divide++;

}

if($number_of_time_divide<3)

{

echo "number".$number; echo "<br>";$count++;

}

$number=$number+1;

}