Are there any specific PHP libraries or resources that provide guidance on checking the validity of website URLs?

To check the validity of website URLs in PHP, you can use the filter_var function with the FILTER_VALIDATE_URL filter option. This function will return true if the URL is valid and false if it is not. You can also use regular expressions to perform more specific validation if needed. 

$url = "https://www.example.com";

if (filter_var($url, FILTER_VALIDATE_URL)) {
    echo "URL is valid";
} else {
    echo "URL is not valid";
}

Keywords

PHP libraries resources website URLs validity.

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