What is the best way to check if a given website URL exists using PHP?

One way to check if a given website URL exists in PHP is by using the `get_headers()` function, which sends a HEAD request to the URL and returns the response headers. We can then check if the response code is in the 200 range to determine if the URL exists. 

function urlExists($url) {
    $headers = @get_headers($url);
    if($headers && strpos($headers[0], '200')) {
        return true;
    } else {
        return false;
    }
}

// Example usage
$url = 'https://www.example.com';
if(urlExists($url)) {
    echo 'URL exists';
} else {
    echo 'URL does not exist';
}

Keywords

PHP URL existence validation function

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