Write PHP Program To Check Prime Number

PHP

PHP Program To Check Prime Number :

The below program checks if a number is a prime or a composite number. The PHP echo statement is used to output the result on the screen. Example 

<!DOCTYPE html>
<html>
<body>
 
<?php
   $num = 13;  
   $count=0;  
   for ( $i=1; $i<=$num; $i++){  
     if (($num%$i)==0){  
       $count++;  
     }  
   }  
   if ($count<3){  
     echo "$num is a prime number.";  
   }
   else{
     echo "$num is not a prime number."; 
   }
?>
 
</body>
</html>
Output 

13 is a prime number.
       
Updated on 16-Mar-2022 8:40:06

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