What are the potential pitfalls of not initializing variables like $maxGrafik and $geschrieben in PHP scripts?

Not initializing variables like $maxGrafik and $geschrieben in PHP scripts can lead to unexpected behavior or errors due to using variables that have not been assigned a value. To solve this issue, it is important to initialize variables before using them to ensure they have a default value.

$maxGrafik = 0;
$geschrieben = "";