PHP supports 8 basic data types

Boolean (Boolean): This is the simplest type, with only two values, which can be true/true or false/false, not case-sensitive. For more information, see: Php Boolean Type (Boolean)
Integer (integer): It has a valid range of 32-bit operating systems:-2 147 483 648~+2 147 483 647. Integer values can be expressed in decimal, hexadecimal, or octal, preceded by an optional symbol (-or +). Octal indicates that the number must be preceded by 0 (0), and hexadecimal indicates that the number must be preceded by 0x. For more information, see: PHP Integer data (integer)
Float (floating point, also called double): the valid range in a 32-bit operating system is: 1.7e-308~1.7e+308. For more information, see: PHP Floating-point type (float)
String: A character variable differs from another programming language in that it has characters and strings, and in PHP, a character variable is used uniformly to define a character or string. For more information, see: PHP String type

Two kinds of composite types:
Arrays (arrays): Array variables are a special type of variable, PHP array type (object)
Object: Objects are also a special type of data. To create an object variable, use the New keyword. For more information, see: PHP Object Type

Finally, there are two special types:
Resource (Resource): A source is a special variable that holds a reference to an external resource. Resources are created and used through specialized functions. For more information, see: PHP Resource Type (Resource)
Null (NULL): Indicates that a variable has no value. The only possible value for a null type is NULL.

PHP supports 8 basic data types