A little of PHP (server side language) and the "sprintf" function

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Ade Wale

Hi David,

What could be the issue with this line of code?

$message = sprintf("%s <%s>\n\n%s", $name, $email, $comments);

The print is just <> but I am expecting the send name and his/her comment.

Thanks

DecSoft

Hello Ade,

At a first view, the "sprintf" function format string appear good, then, if you get "empty" strings, there cannot be other reason than the variables "$name", "$email" and "$comments" are not filled as you expected.

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Ade Wale

Hi,

I read about sprintf on the website and after implement the idea I got from their on AB.

This error message came displayed

[img=error.png]https://www.decsoftutils.com/_support/uploads/cd06e80ad6f7f5e082422a18dd2ec7ab.png[/img]

What could be the issue?

DecSoft

Hello Ade,

Please, can you provide me with a little application sample in order to try to reproduce the problem here? I can't figure how to help you without an small sample Ade...

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Ade Wale

Hi David,

Check your email I have sent the sample project I am playing with.

I tried this php script too

<?php<br>session_start();<br>if( isset($_POST['name']) && ($_POST['email']) && $_POST['comments'] )<br>{
	$to = 'myemail@gmail.com'; // Replace with your email	<br>	$subject = 'Message from website'; // Replace with your $subject<br>	$headers = 'From: ' . $_POST['email'] . "\r\n" . 'Reply-To: ' . $_POST['email'];	<br>	
	$message = 'Name: ' . $_POST['name'] . "\n" .<br>	           'E-mail: ' . $_POST['email'] . "\n" .<br>	           'Subject: ' . $_POST['subject'] . "\n" .<br>	           'Message: ' . $_POST['message'];<br>	
	mail($to, $subject, $message, $headers);	<br>	if( $_POST['copy'] == 'on' )<br>	{<br>		mail($_POST['email'], $subject, $message);<br>	}<br>}
?>

DecSoft

Hello Ade,

Two things to note:

1º Your script must respond with an "http_response_code(200);" to avoid the Http Client's Error event to be fired.

2º Take care with the email input. Since they are an email input, for example, Internet Explorer put a value of "undefined" if the input's value is not a valid email address. May you can use the IsEmail action in the application.

Hope this information can help to solve your problem!

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Ade Wale

Hi,

I am your PHP script "AS IS" that come with AB.

1. This is line code has take care of respond with an "http_response_code(200);" correct me if I am wrong.

if (mail('myemail@domainname.com', 'Send The Message To My Inbox', $message)) {<br>    // Mail sent<br>    http_response_code(200);<br>  } else <br>........

2. The email input has been taking care with this line of code:

$email = filter_input(INPUT_POST, 'EmailInput', FILTER_VALIDATE_EMAIL); and

IfEx "([NameInput.Value] == '') || ([EmailInput.Value] == '') || ([CommentsTextarea.Value] == '')"</p>
<p>  // If not, advert to the user<br>  AlertBox "Please, provide all the feedback information" "warning"<br>Else

Regarding the Internet Explorer I am not consider it at the moment because this will be use only in Android platform.

After could of try and error in the PHP script. I have not got it working.

DecSoft

Hello Ade,

The "feedback.php" script including in the Calculator sample is the below one:

<?php</p>
<p>// Enable CORS (http://enable-cors.org/server_php.html)<br>header('Access-Control-Allow-Origin: *');</p>
<p>// Access-Control headers are received during OPTIONS requests<br>if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {<br>  if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))<br>    header("Access-Control-Allow-Methods: GET, POST, OPTIONS");<br>  if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))<br>    header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");<br>  exit;<br>}</p>
<p>// Recolect and validate the input data<br>$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);<br>$name = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_SPECIAL_CHARS);<br>$comments = filter_input(INPUT_POST, 'comments', FILTER_SANITIZE_SPECIAL_CHARS);</p>
<p>// Test if the input data is valid<br>if (($email !== false) && ($name !== false) && ($comments !== false)) {</p>
<p>  // Prepare our mail message<br>  $message = sprintf("%s <%s>\n\n%s", $name, $email, $comments);</p>
<p>  if (mail('info@decsoftutils.com', 'App Builder Calculator Feedback', $message)) {<br>    // Mail sent<br>    http_response_code(200);<br>  } else {<br>    // mail function fail!<br>    http_response_code(500);<br>  }<br>} else {<br>  // Invalid input data<br>  http_response_code(406);<br>}

As you can see we play with response codes, then we can use such response codes our the app.

About the email validation, I note that the variable can become "undefined", which is not "" (empty) but a different thing. Anyway, we always must validate the user's input also in the app's server.

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Ade Wale

Hi David,

Thanks issued solved.

AB Ninja rock!

DecSoft

Hello!

Hi David,

Thanks issued solved.

AB Ninja rock!

Glad to know!

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