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Datentypen

PHP

string. String of characters so basically just a text. Defined by ''.
int. Whole numbers. Litterally just numbers without a comma.
float. Decimal numbers. Litterally just numbers with a comma.
bool. True or False value. Defined by true or false. Thingy can be truthy and falsy like 0 and 1.
array. List of multiple values. Can contain all sorts of things like Objects, strings, numbers. Index can be named or just numbers.
objects. Objects can be all sorts of things like value Objects. But also could be a SQL query or whatever.
null The defined absence of a value.