Introduction to the latest functions of PHP 7.3: Make your programming more efficient

As a widely used programming language, PHP is constantly evolving and adding new features. At the beginning of 2019, PHP 7.3 version was grandly launched, including many eye-catching new functions and features. In this article, we will introduce you to some of the latest functions of PHP 7.3. We hope that these new functions will make your programming more efficient.

1. is_countable function

The new function is_countable can determine whether a variable has a counting function. Returns true if the variable can be counted, false otherwise. This function is very useful for judging when traversing arrays and objects.

2. array_key_first and array_key_last functions

PHP 7.3 introduces two new functions array_key_first and array_key_last, which return the first and last key names of the array respectively. These functions greatly facilitate PHP developers' programming when dealing with associative arrays.

3. Variable parameters of the array_replace function

In PHP 7.3, the array_replace function supports variable parameters, that is, it supports an unlimited number of parameters. This new feature makes program code more compact, eliminating the need to write a variable or an array for each parameter.

4. The preg_replace_callback_array function is introduced

This function is very similar to the preg_replace_callback function, but supports the use of multiple callback functions as an array. This new feature can greatly improve the readability and maintainability of your code, especially when multiple patterns need to be replaced.

5. The is_iterable function is introduced

The is_iterable function introduced in PHP 7.1 is re-introduced into PHP 7.3. This function can be used to check whether a variable can be traversed using foreach. It's convenient and saves you programming time and effort.

6.json_throw_on_error method

In previous PHP versions, some difficult errors may occur when processing JSON data, such as illegal characters or unknown attributes when parsing JSON. The json_throw_on_error method was introduced in PHP 7.3, which can throw an exception when an error occurs so that you can better debug your code.

7. The third parameter of the array_key_exists function is introduced

In PHP 7.3, the array_key_exists function introduces a new third parameter strict. This parameter represents whether to perform strict type checking on the type of the key name. If strict is set to true, the type of the key name will be checked and the integer string will be type-converted.

Summary

In addition to the latest functions above, PHP 7.3 also introduces many other features, including multiple new error handling functions, enhanced function prototype verification, and more. These new features reflect the continuous development and progress of the PHP language. More convenient and faster methods in development can help programmers complete development work faster and better. When learning and using these new features, please pay attention to the differences in versions and choose according to your actual needs. I believe that with your efforts, you can find the methods and functions that best suit you in PHP 7.3 version, making your programming more efficient.

The above is the detailed content of Introduction to the latest functions of PHP 7.3: Make your programming more efficient. For more information, please follow other related articles on the PHP Chinese website!