How to use regular expressions to remove Chinese characters in php

php method to use regular expressions to remove Chinese: 1. Create a php sample file; 2. Define a string containing Chinese and English; 3. Use "preg_replace('/([\x80-\xff] *)/i','',$a);" The regular method can remove Chinese characters in the query results.

The operating environment of this tutorial: Windows 10 system, PHP version 8.1, DELL G3 computer

php How to use regular expressions to remove Chinese?

PHP uses regular expressions to remove Chinese characters from strings

When I was building a foreign language website recently, I needed to remove Chinese characters from a certain query result. In fact, the PHP language is very Convenient, use the following method to easily remove Chinese characters!

For example:

$a = "Hello World! 你好世界！";
$result = preg_replace('/([\x80-\xff]*)/i','',$a);
echo $result;

The output result is:

“Hello World!”

Is it very simple? !

Related introduction:

preg_match - Execute matching regular expression

Instructions

preg_match(
    string $pattern,
    string $subject,
    array &$matches = null,
    int $flags = 0,
    int $offset = 0
): int|false

Search for the regular expression given by subject and pattern A match of the expression.

Parameters

pattern

Pattern to search for, string type.

subject

Enter the string.

matches

If the parameter matches is provided, it will be populated as search results. $matches[0] will contain the text matched by the full pattern, $matches[1] will contain the text matched by the first captured subgroup, and so on.

flags

flags can be set to a combination of the following flag values:

PREG_OFFSET_CAPTURE

If this flag is passed, for each occurrence of a match it is returned The string offset (number of bytes relative to the target string) is appended. Note: This will change the array filled in the matches parameter so that each element becomes a string where the 0th element is the matched string and the 1st element is the offset of the matched string in the target string subject. .

Recommended learning: "PHP Video Tutorial"

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