- var_dump: documentation ( source)
<?php
$cookie = '1234567890';
$ssid = '1234567890';
$pixels = '';
$fetchPixels = null;
$sson_ssid = '987654321';
$loggedIn = true;
$isCookieMissing = $loggedIn && $cookie===null && $ssid;
$isExplicitRequest = !is_null($fetchPixels);
$sapSessionDiffers = !$sson_ssid || $sson_ssid !== $ssid;
$setPixels = ( $isExplicitRequest || $isCookieMissing ) && $sapSessionDiffers;
var_dump($setPixels);