PHP regular: implement method to match only Chinese characters

Title: PHP Regular: Method of matching only Chinese characters

In PHP, regular expressions are a powerful text processing tool that can help us achieve Matching and filtering of specific text. Sometimes we need to match Chinese characters, for which we can use regular expressions. The following introduces a method that demonstrates how to match regular expressions that only match Chinese characters, and provides specific code examples.

Code example:

<?php

$pattern = '/[x{4e00}-x{9fa5}] /u'; // Regular expression matching Chinese characters
$text = "Hello Hello World world";

preg_match_all($pattern, $text, $matches);

foreach ($matches[0] as $match) {
    echo $match .PHP_EOL;
}

Explanation:

1. In the above code, we define a regular expression $pattern to match Chinese characters. Among them, [x{4e00}-x{9fa5}] represents all Chinese characters within the unicode encoding range.
2. Contains some Chinese and English characters in the text $text.
3. Use the preg_match_all function to match $text and store the matching results in the $matches array.
4. Finally print out the matched Chinese characters through a loop.

Through the above example code, we can implement a method of matching only Chinese characters. Of course, in practical applications, we can adjust the regular expression as needed to adapt to different Chinese character matching requirements. Hope the above content is helpful to you.

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