php constant in mail header 1

PeDa · Jul 31, 2021

The following script, in which the 'From' parameter is defined in a variable, works as expected:

Code:

<html>
<title>Test mail</title>
<body>
<?php
define("INFO", "info@mysite.nl");
$from="info@mysite.nl";
$recipient = 'fred@bloggs.nl';
$subject='Test subject';
$body='hello from info';
$headers = "From: Joe Bloggs <{$from}>";
//$headers = "From: Joe Bloggs <{INFO}>";
mail($recipient, $subject, $body, $headers);
?>
</body>
</html>

However if I replace $headers with the version using a constant no mail gets sent. Any suggestions welcome.

feherke · Jul 31, 2021

Hi

In PHP interpolation is supported only for variables, either simple, array value, object property, object method or reference. But not for constants and functions.
Try it with a simpler example, only [tt]echo[/tt] the result of string interpolation.

If you want to use the constant, you will have to do it with concatenation :

Code:

[navy]$headers[/navy] [teal]=[/teal] [i][green]"From: Joe Bloggs <"[/green][/i] [teal].[/teal] INFO [teal].[/teal] [i][green]">"[/green][/i][teal];[/teal]

Well, actually there are other ways too, like [tt]sprintf()[/tt], but does not really worth the effort :

Code:

[navy]$headers[/navy] [teal]=[/teal] [COLOR=orange]sprintf[/color][teal]([/teal][i][green]"From: Joe Bloggs <%s>"[/green][/i][teal],[/teal] INFO[teal]);[/teal]

Feherke.
feherke.github.io

PeDa · Aug 1, 2021

Hello Feherke,
Thank you; learned something new again.
Peter Da

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php constant in mail header 1

PeDa

Technical User

feherke

Programmer

PeDa

Technical User

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