New functions in PHP8: Practical methods of get_debug_type()

Recently, PHP8 was officially released, which contains many new features and improvements. One of the more useful new functions is get_debug_type(). In this article, we will introduce some practical methods of get_debug_type().

get_debug_type() is a new function in PHP8. It is mainly used to get the type of a variable, and the return value is a string. Unlike other functions that get the type of a variable, the type returned by get_debug_type() is the type name used internally by PHP, rather than the string usually used to represent the type. This has the advantage of better distinguishing the difference between PHP internal types and type-specific string representations.

The following is an example that demonstrates how to use the get_debug_type() function:

<?php
    $a = 42;
    $b = "Hello, World!";
    $c = array(1, 2, 3);
    
    var_dump(get_debug_type($a));  // 输出 "int"
    var_dump(get_debug_type($b));  // 输出 "string"
    var_dump(get_debug_type($c));  // 输出 "array"
?>

As you can see, when we use the get_debug_type() function to obtain the variables $a, $b and $ When the type is c, the returned values ​​are "int", "string" and "array" respectively.

So, what practical methods does get_debug_type() actually have? Here are a few common usage scenarios.

Help debugging

When debugging a PHP application, you often need to ensure that the variables you want to use have the correct type. You can easily check the type of a variable by calling get_debug_type(). For example, you can insert the following code somewhere in your application:

var_dump(get_debug_type($my_var));

This saves some manual conversion steps, and more importantly, it avoids the problem of using the wrong type. mistake.

Determine the data type

When processing data, the get_debug_type() function can help determine the type of data. This is useful when interacting with databases. For example, in some cases you may want to use a specific data type to execute a query to achieve better performance. Using the get_debug_type() function you can easily see the type of your data and determine accordingly which database column type to use.

Reduce Errors

When developing applications using a combination of multiple PHP libraries and frameworks, you often encounter incompatible data types. When processing data, the get_debug_type() function ensures that you use the correct type. This reduces input type errors and the resulting code errors and application failures.

In short, get_debug_type() is a very practical function, especially for developers who need to debug and process different types of data. This function is very simple to use, but gives you greater reliability and better performance when processing data. If you are upgrading to PHP8 or developing a new application, be sure to consider using the get_debug_type() function to improve the usability and reliability of your code.

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