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# Chapter 6. Types

PHP supports the following types:

- array

- floating-point numbers

- integer

- object

- string

The type of a variable is usually not set by the programmer; rather, it is decided at runtime by PHP depending on the context in which that variable is used.

If you would like to force a variable to be converted to a certain type, you may either cast the variable or use the settype() function on it.

Note that a variable may behave in different manners in certain situations, depending on what type it is at the time. For more information, see the section on Type Juggling.

# Integers

Integers can be specified using any of the following syntaxes:

      1
      2 $a = 1234; # decimal number
      3 $a = -123; # a negative number
      4 $a = 0123; # octal number (equivalent to 83 decimal)
      5 $a = 0x12; # hexadecimal number (equivalent to 18 decimal)
      6

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