What are the big data types in php8

php8 Big data types include integer types, floating point types, string types, array types, object types, resource types, empty types and non-numeric types. Detailed introduction: 1. The integer type is used to represent integer values, including positive integers, negative integers and zero; 2. The floating point type is used to represent values ​​with decimal points; 3. The string type is used to represent a string of characters; 4. Array types are used to represent ordered collections of multiple values; 5. Object types are used to represent instances with properties and methods; 6. Resource types are used to represent external resources, such as database connections, file handles, etc.

The operating system of this tutorial: windows10 system, php8.1.3 version, DELL G3 computer.

In PHP8, there are the following big data types:

1. Integer type (integer): Integer type is used to represent integer values, including positive integers, negative integers and zero. In PHP, integer types do not have a fixed size limit and can change based on the system's memory limitations. Variables of integer type can be declared using the int or integer keywords.

2. Floating point type (float): The floating point type is used to represent values ​​with decimal points. In PHP, floating point types use the double precision floating point format (IEEE 754), which can represent very large or very small values. Variables of floating point type can be declared using the float, double or real keywords.

3. String type (string): The string type is used to represent a string of characters. In PHP, a string is a sequence of characters that can contain any characters, including letters, numbers, symbols, etc. You can enclose a string in single or double quotes, and you can use the string keyword to declare a variable of string type.

4. Array type (array): The array type is used to represent an ordered collection of multiple values. In PHP, arrays can contain values ​​of any type, including integers, floating point numbers, strings, objects, etc. Variables of array type can be declared using the array keyword.

5. Object type (object): Object type is used to represent instances with properties and methods. In PHP, objects are instantiated through classes, and a class can have multiple objects. You can define a class using the class keyword, and then create an object using the new keyword.

6, Resource type(resource): Resource type is used to represent external resources, such as database connections, file handles, etc. In PHP, a resource type is a special data type managed by the PHP kernel. Resources can be created and manipulated by calling the corresponding functions.

7. Empty type (null): The null type is used to represent a null value. In PHP, the empty type has only one value, null. Variables of empty type can be declared using the null keyword.

In addition to the above big data types, PHP8 also introduces a new data type:

8. Non-numeric type (NaN): Non-numeric type is used to represent non-numeric value (Not a Number). In PHP, a non-numeric type is a special floating-point value used to represent invalid or undefined numerical operation results. You can use NAN constants to represent non-numeric values.

These are common big data types in PHP8, each data type has its own characteristics and uses. Based on actual needs, select appropriate data types to store and operate data.

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