PHP supports 8 data types:
- Integer: A whole number, either positive or negative.
- Float: A number with a decimal point.
- String: A sequence of characters.
- Boolean: A true or false value.
- Array: A collection of values.
- Object: An instance of a class.
- NULL: A special type that represents a variable with no value.
- Resource: A special type that represents a reference to an external resource, such as a database connection.
PHP is a loosely typed language, which means that the data type of a variable is not explicitly declared. Instead, it is determined by the value that is assigned to the variable. For example, if a string value is assigned to a variable, it becomes a string type. If an integer value is then assigned to the same variable, it becomes an integer type.