Friday, January 1, 2016

function isPrime

<?php
function isPrime($number)
{
        if ($number < 2) {
                return false;
        }
        for ($i=2; $i<=($number / 2); $i++) {
                if($number % $i == 0) { 
                        return false;
                }
        }
        return true;
}
?>

<form method="post">
Enter number:<input type="text" name="num">
<input type="submit" value="go" name="sub">
</form>

<?php
if(isset($_POST['sub'])) {
$number = $_POST['num'];

if(isPrime($number)==true) {
echo "<h2>$number is a prime number</h2>";
} else {
echo "<h2>$number is not a prime number</h2>";
}
}
?>

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