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There are 8 data types in PHP which are used to construct the variables:

  1. Integers − are whole numbers, without a decimal point, like 4195.
  2. Doubles − are floating-point numbers, like 3.14159 or 49.1.
  3. Booleans − have only two possible values either true or false.
  4. NULL − is a special type that only has one value: NULL.
  5. Strings − are sequences of characters, like ‘PHP supports string operations.’
  6. Arrays − are named and indexed collections of other values.
  7. Objects − are instances of programmer-defined classes, which can package up both other kinds of values and functions that are specific to the class.
  8. Resources − are special variables that hold references to resources external to PHP.

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