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  1. <?php
  2. $start=$_GET["num"];
  3. echo "Prime Numbers between 0 to ".$start.": "; 
  4. function primefun($n){
  5.     $count = 1;
  6.     for($i = 2; $i<=$n/2;$i++){
  7.    if($n % $i == 0){
  8.       $count =0;
  9.    }
  10.  }
  11.  return $count;
  12. }
  13. for ($x = 2; $x <= $start; $x++) { 
  14.     $r=primefun($x);
  15.     if($r== 1){
  16.     echo "$x<br>";
  17.     }
  18.  }
  19. ?>
Success #stdin #stdout #stderr 0.02s 26044KB
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stdin
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10
stdout
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Prime Numbers between 0 to :
stderr
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PHP Notice:  Undefined index: num in /home/GdkJXn/prog.php on line 2
https://ideone.com/vxL4vW
language:
PHP (php 7.3.5)
created:
1 year ago
visibility:
public

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