PHP8 function: various usage examples of get_debug_type()

PHP 8 is the latest major version of the PHP programming language, which introduces a number of new functionality and language features, including a brand new function get_debug_type(). The get_debug_type() function is a very useful function that can help developers handle variable types more conveniently in their code. Next, we'll look at some examples of various uses of the get_debug_type() function.

1. Understand the get_debug_type() function

The get_debug_type() function is a newly introduced function in PHP 8. It can help developers handle variable types more conveniently in code. The type of a given variable can be obtained by calling the get_debug_type() function. If the variable is an object, returns the object's class name. If the variable is a string, "string" is returned, if the variable is an integer, "int" is returned, and so on.

The following is the syntax of the get_debug_type() function:

get_debug_type ($var): string

Among them, $var is a variable that needs to get the type.

2. Usage Examples

Next, we will introduce some usage examples of the get_debug_type() function to help you better understand its usage.

1. Use the get_debug_type() function to handle variable types

Using the get_debug_type() function can help developers handle variable types more conveniently in code. For example, the following code demonstrates how to use the get_debug_type() function and switch statement to handle different logic based on the variable type:

function process_var($var) {
  $type = get_debug_type($var);
  
  switch ($type) {
    case 'int':
      // 处理整数类型的变量
      break;
    case 'string':
      // 处理字符串类型的变量
      break;
    case 'array':
      // 处理数组类型的变量
      break;
    case 'object':
      // 处理对象类型的变量
      break;
    case 'null':
      // 处理 null 类型的变量
      break;
    default:
      // 处理其他类型的变量
      break;
  }
}

2. Get the class name of the object

If the variable is an object, you can use the get_debug_type() function to obtain the class name of the object. For example, the following code demonstrates how to get the class name of a Cats object:

class Cats {}

$cat = new Cats();
echo get_debug_type($cat); // 输出 "Cats"

3. Get the type of the variable

In addition to getting the object type, you can also use the get_debug_type() function Get the variable type of other types. For example, the following code demonstrates how to get the types of strings, integers, and arrays:

$string_var = "Hello world";
echo get_debug_type($string_var); // 输出 "string"

$int_var = 10;
echo get_debug_type($int_var); // 输出 "int"

$array_var = [1, 2, 3];
echo get_debug_type($array_var); // 输出 "array"

4. Handling multiple variables

In some cases, you may need to Handle multiple variables and get their types. For example, the following code demonstrates how to get the types of $var1 and $var2:

$var1 = "Hello";
$var2 = 10;

echo get_debug_type($var1), "
"; // 输出 "string"
echo get_debug_type($var2), "
"; // 输出 "int"

The above are some examples of the use of the get_debug_type() function. I hope these examples can help you better understand and apply this function.

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