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  1. <?php
  2.  
  3. function isPrime($num) {
  4.     if ($num <= 1) return false;
  5.     for ($i = 2; $i * $i <= $num; $i++) {
  6.         if ($num % $i == 0) return false;
  7.     }
  8.     return true;
  9. }
  10.  
  11. echo isPrime(87);
  12. ?>
Success #stdin #stdout 0.03s 25904KB
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https://ideone.com/QGu2D9
language:
PHP (php 7.3.5)
created:
2 days ago
visibility:
public

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