i-stos/index.php

## index.php

<?php

	/**
	 * Validate & Send simple e-mail
	 */

	function validate_field ($field) {
		$field = htmlspecialchars($field, ENT_QUOTES);

		if ( !empty($field) ) {
			return true;
		} else {
			return false;
		}
	}

	function validate_email($email) {
	  $email = filter_var($email, FILTER_SANITIZE_EMAIL);

	  if ( filter_var($email, FILTER_VALIDATE_EMAIL) ) {
			return true;
		} else {
			return false;
		}
	}

	$errors = array();

	if ($_SERVER['REQUEST_METHOD'] == "POST") {
		$name = $_POST['name'];
		$email = $_POST['email'];

		if ( !validate_field($name) ) {
			$errors['name'] = 'Please enter a name.';
		}
		if ( !validate_email($email) ) {
			$errors['email'] = 'Please enter a valid email.';
		}

		if ( empty($errors) ) {
			$message = $name . " requests that you contact him/her back at " . $email . ".";
			mail("receiver@example.com", "Subject: Contact Request", $message, "From: $email");
			$success = "Thank you for contacting us!";
		}
	  }
?>
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8" >
	<title> Some Page </title>
	<meta name="description" content="">
	<meta name="author" content="">
	<meta name="viewport" content="width=960, initial-scale=1.0">

	<link rel="stylesheet" href="#"  media="screen">
</head>
<body>
<div id="container">
	<form action="index.php" method="post">
		<p>
		  <label for="name"> Name: </label> <br />
		  <input type="text" name="name" placeholder="Name (required)" /> <br />
		  <?php if ( isset($errors['name']) ): ?>
			  <?php  printf("<span class='err'>" . $errors['name'] . "</span>");  ?>
		  <?php endif; ?>
		</p>

		<p>
		  <label for="email">Email: </label> <br />
		  <input type="text" name="email" placeholder="Email (required)" /> <br />
		  <?php if ( isset($errors['email']) ): ?>
		      <?php  printf("<span class='err'>" . $errors['email'] . "</span>");  ?>
		  <?php endif; ?>
		</p>

		<p> <input type="submit" value="Contact" /> </p>
		<?php if ( isset($success) ): ?>
			  <?php  printf("<span class='success'>" . $success . "</span>");  ?>
		<?php endif; ?>
	</form>
</div>
</body>
</html>

	<?php

	/**
	* Validate & Send simple e-mail
	*/

	function validate_field ($field) {
	$field = htmlspecialchars($field, ENT_QUOTES);

	if ( !empty($field) ) {
	return true;
	} else {
	return false;
	}
	}

	function validate_email($email) {
	$email = filter_var($email, FILTER_SANITIZE_EMAIL);

	if ( filter_var($email, FILTER_VALIDATE_EMAIL) ) {
	return true;
	} else {
	return false;
	}
	}

	$errors = array();

	if ($_SERVER['REQUEST_METHOD'] == "POST") {
	$name = $_POST['name'];
	$email = $_POST['email'];

	if ( !validate_field($name) ) {
	$errors['name'] = 'Please enter a name.';
	}
	if ( !validate_email($email) ) {
	$errors['email'] = 'Please enter a valid email.';
	}

	if ( empty($errors) ) {
	$message = $name . " requests that you contact him/her back at " . $email . ".";
	mail("receiver@example.com", "Subject: Contact Request", $message, "From: $email");
	$success = "Thank you for contacting us!";
	}
	}
	?>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8" >
	<title> Some Page </title>
	<meta name="description" content="">
	<meta name="author" content="">
	<meta name="viewport" content="width=960, initial-scale=1.0">

	<link rel="stylesheet" href="#" media="screen">
	</head>
	<body>
	<div id="container">
	<form action="index.php" method="post">
	<p>
	<label for="name"> Name: </label> <br />
	<input type="text" name="name" placeholder="Name (required)" /> <br />
	<?php if ( isset($errors['name']) ): ?>
	<?php printf("<span class='err'>" . $errors['name'] . "</span>"); ?>
	<?php endif; ?>
	</p>

	<p>
	<label for="email">Email: </label> <br />
	<input type="text" name="email" placeholder="Email (required)" /> <br />
	<?php if ( isset($errors['email']) ): ?>
	<?php printf("<span class='err'>" . $errors['email'] . "</span>"); ?>
	<?php endif; ?>
	</p>

	<p> <input type="submit" value="Contact" /> </p>
	<?php if ( isset($success) ): ?>
	<?php printf("<span class='success'>" . $success . "</span>"); ?>
	<?php endif; ?>
	</form>
	</div>
	</body>
	</html>