Are there any best practices for using regular expressions in PHP to filter out specific characters from a string?

When using regular expressions in PHP to filter out specific characters from a string, it is important to define a pattern that matches the characters you want to remove. You can use the `preg_replace()` function to replace the matched characters with an empty string, effectively filtering them out from the original string. 

$string = "Hello, World!";
$filteredString = preg_replace('/[^\p{L}\p{N}\s]/u', '', $string);
echo $filteredString; // Output: Hello World

Keywords

regular expressions PHP filter characters string

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