How Can I Efficiently Get HTTP Status Codes Using PHP\'s Curl?

How to Efficiently Obtain HTTP Code with PHP Using curl

When using curl to determine the status of a website, such as whether it's up, down, or redirecting, it's important to minimize performance overhead. However, the provided code downloads the entire page, adversely affecting performance.

To optimize this process, consider the following steps:

• Validate the URL: Ensure the URL is valid before making the request to save time.
• Request Headers Only: Specify that only headers are retrieved, excluding body content. This significantly reduces data transfer time:

<code class="php">curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);</code>

• Refer to Additional Documentation: For further guidance on obtaining HTTP status codes, refer to the documentation on checking URL existence:

if(!$url || !is_string($url) || ! preg_match('/^http(s)?:\/\/[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(\/.*)?$/i', $url)) {
    return false;
}

Optimized Code:

<code class="php">$url = 'http://www.example.com';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$output = curl_exec($ch);
$httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo 'HTTP code: ' . $httpcode;</code>

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