PHP8.1 update: performance improvements for array and string functions

PHP8.1 Update: Performance improvements for array and string functions

The PHP programming language has continued to evolve and improve over time. The recently released version of PHP 8.1 brings many new features and performance enhancements, especially when it comes to array and string functions. These improvements allow developers to handle array and string operations more efficiently, improving overall performance and efficiency.

1. Performance improvement of array functions

In PHP8.1, array functions have been improved and optimized. The following are some important examples of array function performance improvements:

(1) array_merge() function:

In previous versions, the array_merge() function was used to merge two or more arrays . However, this function may perform poorly when working with large arrays. In PHP8.1, in order to improve performance, the new ZEND API was introduced, which significantly improved the performance of the array_merge() function.

Sample code:

$array1 = [1, 2, 3];
$array2 = [4, 5, 6];
$result = array_merge($array1, $array2);

print_r($result);

(2) array_key_exists() function:

In PHP8.1, the array_key_exists() function has also been optimized for performance. This function is used to check whether the specified key exists in the array. In previous versions, when using the array_key_exists() function, a linear search was performed during the lookup. If the array was large, the time complexity of the query could be high. In PHP8.1, this function uses a more efficient hash table to perform lookup operations, thus improving performance.

Sample code:

$array = ['name' => 'John', 'age' => 30, 'gender' => 'male'];

if (array_key_exists('age', $array)) {
    echo "Age exists in the array.";
} else {
    echo "Age does not exist in the array.";
}

2. Performance improvement of string functions

In addition to array functions, PHP8.1 also supports some commonly used string functions The function has been optimized for performance. The following are two examples:

(1) str_starts_with() function:

In PHP8.1, the new str_starts_with() function is introduced to check whether the string ends in the specified The beginning of the substring. This function uses a more efficient algorithm for matching, improving performance.

Sample code:

$string = "Hello, world!";

if (str_starts_with($string, "Hello")) {
    echo "The string starts with 'Hello'.";
} else {
    echo "The string does not start with 'Hello'.";
}

(2) str_contains() function:

Similarly, PHP8.1 also introduces a new str_contains() function for checking strings contains the specified substring. This function uses a more efficient algorithm to find matches, improving performance.

Sample code:

$string = "Hello, world!";

if (str_contains($string, "world")) {
    echo "The string contains 'world'.";
} else {
    echo "The string does not contain 'world'.";
}

Summary:

The update of PHP8.1 has brought significant improvements in the performance of array and string functions. By using these optimized functions, developers can handle array and string operations more efficiently, thereby improving the performance and efficiency of their code. If you are a PHP developer, it is strongly recommended to upgrade to PHP8.1 version to enjoy the benefits of these new features and optimizations.

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