friendica_2021.01_tupambae_.../include/security.php

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<?php
function can_write_wall(&$a,$owner) {
if((! (local_user())) && (! (remote_user())))
return false;
if((local_user()) && ($_SESSION['uid'] == $owner))
return true;
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `id` = %d AND `blocked` = 0 AND `pending` = 0
AND `readonly` = 0 AND `rel` IN ( %d , %d ) LIMIT 1",
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intval($owner),
intval($_SESSION['visitor_id']),
intval(REL_VIP),
intval(REL_BUD)
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);
if(count($r))
return true;
return false;
}