How to Extract Cookies from a PHP cURL Response Using Regular Expressions?

Extracting Cookies from a PHP cURL Response

Retrieving cookies embedded in HTTP headers can be essential for parsing responses from non-standard communication protocols. To simplify this task, avoid unnecessary file write operations, and potentially save ample time, consider the following solution using PHP's cURL extension:

// Initialize cURL
$ch = curl_init('http://www.google.com/');

// Enable response caching and header retrieval
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);

// Execute cURL request
$result = curl_exec($ch);

// Extract cookies from header using regular expression (multi-cookie support)
preg_match_all('/^Set-Cookie:\s*([^;]*)/mi', $result, $matches);
$cookies = array();
foreach($matches[1] as $item) {
    parse_str($item, $cookie);
    $cookies = array_merge($cookies, $cookie);
}

// Display the extracted cookies as an array
var_dump($cookies);

This solution effectively extracts cookies from a cURL response using regular expressions and stores them in an associative array. By leveraging PHP's built-in cookie handling capabilities, you can avoid writing to a file and simplify the process of parsing cookies from custom protocols.

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