ob_get_clean();

The code attached below works. An html email message is sent in the function called display_email(); using this code:
ob_start();
display_email();
$msg .= ob_get_clean();

I have constructed the actual message in a function as the email contained quite a bit of dynamic informaion and it seemed to be the only way I could get the email to send its content.

My question relates to an errror I recieve in de bug mode that states that the variable $msg is undefined. My code works, everying seems to function just fine hower I would preref to figure out what the undefined $msg variabke is all about. Especially as the $msg is there when it pop out as an email message.
Thanks,
N
$headers  = 'MIME-Version: 1.0' . "\r\n";
				$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
				$headers .= "Reply-To: ".$_POST['fp']['Contact Email Address'][0]." \r\n";
				$headers .= "From: ".$_POST['fp']['Contact Email Address'][0]."\r\n";
				
           // Send
                $subject = $_POST['subject'];
           		$to      = "someemail@somedoman.com" ;
			
		
ob_start(); 
display_responce($_POST['heading'], $_POST['subject'], $_POST['fp'], $_POST['sf']);
$msg .= ob_get_clean(); 
 
        mail($to, $subject, $msg, $headers);

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Neil_BradleyWeb UX/UI DeveloperAsked:
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Dave BaldwinFixer of ProblemsCommented:
$msg .= ob_get_clean();

That uses the '.' syntax for concatenating something onto a string.  Just put $msg = ""; near the beginning of your page and then it will be defined.
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Ray PaseurCommented:
Unlike PHP's habit of creating an array when you use the "append" notation, PHP does not create a string when you use the "append" notation. Instead it raises a Notice when you attempt to append to an undefined string, then it creates the string using the content you asked for.  It is an annoying inconsistency in the language.  You can predefine your string variables like DaveBaldwin suggested (and that is my preferred way to handle this situation).  You can suppress the Notice with this.

error_reporting(E_ALL ^ E_NOTICE);

That is the default PHP error reporting setting.  I prefer to see the Notice messages because it usually means I have a typographical error!
// WORKS TO ADD A NEW ELEMENT TO THE END OF $x
// CREATES THE ARRAY $x IF IT DOES NOT ALREADY EXIST
// GIVES NO NOTICE THAT IT CREATED AN UNDEFINED VARIABLE
$x[] = 'Hello';

// WORKS TO ADD A STRING TO THE "END" OF VARIABLE $y
// CREATES THE STRING $y IF IT DOES NOT ALREADY EXIST
// RAISES A NOTICE ABOUT AN UNDEFINED VARIABLE
$y .= 'Hello';

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Neil_BradleyWeb UX/UI DeveloperAuthor Commented:
Thanks  Dave an Ray, between you, you have solved and answered my question thoroughly. I am pleased to resolve the $msg .= ob_get_clean(); issue as its the only way I have found to send an email containing code other than simple echoed  strings.
Cheers,
N
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