php array_filter过滤太多了

Question

Here is the code :

<?php 
$a_campagnes = $this->campagne->get_campagnes_client();
foreach($a_campagnes as $o_camp){
    if($o_camp->groupes){
        foreach($o_camp->groupes as $o_groupe){
            if($o_groupe->IDGroupe == $this->session->o_user->IDGroupe){ echo 'ok';}
        }
    }
}
$a_campagnes = array_filter($a_campagnes, function($o_camp){
    if($o_camp->groupes){
        foreach($o_camp->groupes as $o_groupe){
            if($o_groupe->IDGroupe == $this->session->o_user->IDGroupe) return true;
        }
    }
    return false;
});

$a_campagnes contains at first 10 objects

The result of the first foreach is okokokok

The result of $a_campagnes after the array_filter (which is the same code as the first foreach) is null

Where are the four objects matching my first foreach?

EDIT

Just tried that piece of code:

$i_id_groupe_user = $this->session->o_user->IDGroupe;
        foreach($a_campagnes as $o_camp){
            if($o_camp->groupes){
                foreach($o_camp->groupes as $o_groupe){
                    if($o_groupe->IDGroupe == $i_id_groupe_user){ echo 'ok';}
                }
            }
        }
        $a_campagnes = array_filter($a_campagnes, function($o_camp) use ($i_id_groupe_user){
            if($o_camp->groupes){
                foreach($o_camp->groupes as $o_groupe){
                    if($o_groupe->IDGroupe == $i_id_groupe_user) return true;
                }
            }
            return false;
        });

It gives the same result as before

Answer 1

$this doesn't exist inside anonymous functions, and you're trying to use it as if it was inside your class scope, which would be even less logical.

If you want to use whatever $this->session is inside your array_filter() callback, you'll have to either declare a class method specifically for that, or tell the anonymous function that it can use it, like this:

$session = $this->session;
$a_campagnes = array_filter($a_campagnes, function($o_camp) use ($session) {
    if ($o_camp->groupes) {
        foreach($o_camp->groupes as $o_groupe) {
            if ($o_groupe->IDGroupe == $session->o_user->IDGroupe) return true;
        }
    }

    return false;
});