I need to send a template in my mail->body, but in the mail returned, i don't have my template but '1'.
If i do an echo of my template, my template is show good :
$template = require('../../template/newsletter/template_1.php');
echo $template;
And the fail is when i try to call my template in $mail->body like this :
$mail->Body = $template;
You need to return a value from the template file, just requiring it isn't enough. As the docs say:
Successful includes, unless overridden by the included file, return 1.
Note in particular example 5 on that page:
return.php
<?php
$var = 'PHP';
return $var;
?>
noreturn.php
<?php
$var = 'PHP';
?>
testreturns.php
<?php
$foo = include 'return.php';
echo $foo; // prints 'PHP'
$bar = include 'noreturn.php';
echo $bar; // prints 1
?>
So make sure you have a return statement in your template file, or have it output content and capture it with output buffering. Alternatively, use a templating system that does this for you such as Smarty or Twig.