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.
How to check prime number in PHP?
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PHP on 2022-11-16 13:34:57
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