Using null as an array offset is deprecated

[plusminmax]

phd/phpdotnet/phd/Package/PHP/Web.php

Line 207 in 5d705c2

$setup["history"] = $this->history[$setup["source"]["path"]] ?? [];

Trying to access array offset on null

phd/phpdotnet/phd/Package/PHP/Web.php

Line 440 in 5d705c2

return isset($this->sources[$id]) ? $this->sources[$id] : null;