PHP8 function: new uses for str_contains()

PHP 8 is a more powerful programming language that introduces many new functions and features, one of which is the str_contains() function. The str_contains() function is mainly used to check whether a string contains a specified substring. It can be used in a variety of different applications, such as search engines, data analysis, and Web applications. In this article, we will introduce new uses for the str_contains() function and why it is so important in modern web development.

The str_contains() function is a new feature of PHP 8, which was introduced in version 7.3. It can be used to check whether a string contains a specified substring. This function is very simple and only requires passing in two parameters: the string to be searched and the substring to be searched. Returns true if the string being searched contains the specified substring, false otherwise. Here's a basic example:

$string = "This is a test string";
$search = "test";

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

When you run this code snippet, it will output "String contains 'test'".

Currently, most uses of the str_contains() function are to check whether a string contains a specified substring. However, PHP 8 extends its usefulness further to comparing two strings for equality. By using the str_contains() function, we can easily compare whether two strings contain the same characters without using other comparison functions.

The following is an example of using the str_contains() function to compare two strings:

$string1 = "Hello, World!";
$string2 = "World, Hello!";

if (str_contains($string1, $string2)) {
    echo "The strings are equal";
} else {
    echo "The strings are not equal";
}

In the above example, we assign the two strings to the $string1 and $string2 variables respectively. . We then use the str_contains() function to check if the two strings contain the same characters. If they contain the same characters, it will output "The strings are equal", otherwise it will output "The strings are not equal".

The new purpose of the str_contains() function allows us to easily compare whether two strings contain the same characters. This comparison usually requires the use of other functions, such as strcmp() or strcasecmp(). However, the str_contains() function has a simpler syntax, thus saving time and effort in writing code. This function also performs significantly better than other functions in some applications that require comparing many strings.

In general, the str_contains() function has been well extended and optimized in PHP 8. It can be used not only to check whether a string contains a specified substring, but also to compare whether two strings contain the same characters. This makes it very important in modern web development because it makes it easier for us to compare and process large amounts of strings. If you are using PHP 8 and need to process a large number of strings, please consider using the str_contains() function, which will make your development work easier and more efficient.

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