How to catch exceptions with symfony without rendering httpException page - php

Question

I am working on the development of a centralized authentication web app with Symfony 3.4 and I encounter a problem with the auto-management of exception that Symfony provides. The problem is that I want to catch a ConnectionException raised by the LDAP component when the connexion to the Active Directory fails. The objective is to use this exception to notice when it fails and to redirect to a specific page. But at the very moment when the Exception is raised by the LDAP component, Symfony notice a kernel.exception event and then render a debug exception page instead of letting the program go and catch the exception.
How could I do to fix that problem and be sure that the Exception is caught and use by my code and not automatically by Symfony ?
I join you the sample of code and the page rendered:
<?php
namespace App\Utils;
use App\Entity\User;
use Symfony\Component\Ldap\Ldap;
use Symfony\Component\Ldap\Exception\ConnectionException;
class ActiveDirectoryStuff
{
private $domain = 'myDomain';
private $ldapString = 'ldap://';
public function __construct()
{}
public function connection($username, $password)
{
try {
$dn = $username.'#'.$this->domain;
$ldap = Ldap::create('ext_ldap', array(
'connection_string' => $this->ldapString . $this->domain,
));
$ldap->bind($dn, $password); //where the ConnectionException is raised
return $ldap;
} catch (\ConnectionException $ce) {
throw $ce;
}
}
}
Image of the Page Rendered Automatically

Answer 1

You're catching the exception, doing nothing then throwing, this is the same as having no try catch at this level of code
Based on what you said use your framework to redirect to a specific page from within the catch and any other logic you want to run when this error happens, then remove throw $ce; that will stop the default error handler from running which I assume is Symfony's