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Today, I would like to share with you the relevant knowledge of what the eight data types of php are. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

1. Integer (Integer)

Integers contain only integers, including positive and negative numbers, that is, numbers with no decimal point. You can use decimal (base 10), octal (base 8), or hexadecimal (base 16). The default cardinality is the decimal (10 is the cardinality). Octal integers can be declared as leading 0, while hexadecimal integers can be leading 0x. The integer range must be between-2 ^ 31 and 2 ^ 31.

2. Floating point (Doubleorfloat)

You can represent numbers that contain decimals or parts of decimals, including positive and negative types. By default, variables increase the smallest decimal number.

3. String (String)

Contains any letter, including an even number. These two files use double quotation marks in the description. You can also write strings in single quotes, but there are different ways to print variables.

4. Null value (NULL)

These are special types of variables that can contain only one value, NULL. It is customary to use uppercase letters, but be case-sensitive.

5. Boolean type

Contains only two values, TRUE or FALSE. Returns true on success and false on failure. The NULL type value is also considered to be the false in the Boolean value. In addition to NULL, 0 is also considered FALSE in Boolean values. If the string is empty, it is also treated as a FALSE in the Boolean data type.

6. Array (array)

An array is a combined data type that can store multiple values for the same data type

7. Object (Object)

Object data type to store data. An object is an instance of a user-defined class that can contain both values and functions. For PHP, the object must be declared. First, a class object must be declared with the class keyword. Class is a structure that contains properties and methods. Next, define the data type in the class, and then use it in the class instantiation.

8. Resources (Resources)

The Resources in PHP is not the exact data type. They are mainly used to store references to certain function calls or external PHP resources. For example, consider a database call that is an external resource.

These are all the contents of the article "what are the eight data types of php". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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