A simple prime number check written using PHP, HTML and CSS I hope you will find my work useful.
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Program Listing
style.css
* {
box-sizing: border-box;
}
body {
font-family: "Calibri", sans-serif;
background: #e2e1e0;
color: #111;
}
main {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.container {
padding: 50px;
width: 600px;
background: #fff;
text-align: left;
border-radius: 20px;
box-shadow: 0 0 60px rgba(0,0,0,0.05);
}
h1 {
margin: 0;
line-height: 0.9;
}
h2 {
margin: 0;
}
.title {
display: block;
margin: 0 0 40px;
text-align: center;
}
.txtbox {
display: block;
background: #f1f1f1;
width: 100%;
margin: 0 0 20px 0;
padding: 15px;
border: none;
font-size: 20px;
border-radius: 8px;
font-family: "Calibri", sans-serif;
text-align: center;
}
.txtbox:hover,
.txtbox:focus {
background: #e0e0e0;
}
.btnWrapper {
display: inline-flex;
}
.btn {
background: #673ab7;
color: #fff;
padding: 15px;
width: 250px;
opacity: 0.9;
outline: none;
font-size: 20px;
text-transform: uppercase;
border: none;
text-decoration: none;
text-align: center;
font-family: "Calibri", sans-serif;
cursor: pointer;
text-decoration: none;
display: block;
}
.btn:hover {
opacity: 1;
}
.btnReset {
background: #ff5722;
border-radius: 8px 0 0 8px;
}
.btnConvert {
border-radius: 0 8px 8px 0;
}
.answer {
width: 100%;
padding: 20px;
text-align: center;
font-size: 25px;
font-weight: bold;
background: #9e9e9e;
color: #fff;
line-height: 1;
margin-top: 20px;
border-radius: 8px;
}
index.php
<?php
$out = $input = "";
if ($_POST) {
$input=$_POST['txtNum'];
for ($i = 2; $i <= $input-1; $i++) {
if ($input % $i == 0) {
$value= true;
}
}
if (empty($value) && $input != 1) {
$out = '<div class="answer">'.$input.' is a Prime Number </div>';
} else {
$out = '<div class="answer">'.$input.' is not a Prime Number</div>';
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Prime Number Checker in PHP</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<main>
<div class="container">
<div class="title">
<h1>Prime Number Checker in PHP</h1>
<h2>» Jake R. Pomperada, MAED-IT, MIT «</h2>
</div>
<div class="container-wrapper">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" class="frmChecker">
<input type="number" class="txtbox" name="txtNum" id="txtNum" value="<?php echo $input; ?>" placeholder="Input a number" required autofocus>
<div class="btnWrapper">
<a href="index.php" class="btn btnReset" name="btnReset">Reset</a>
<button type="submit" class="btn btnConvert" name="btnConvert">Check</button>
</div>
<?php echo $out; ?>
</form>
</div>
</div>
</main>
</body>
</html>
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