PHP setcookie function polyfill with support for SameSite attribute (compatible with PHP 5.0+)

setcookie_samesite_polyfill.php

<?php

/**
 * Setcookie function with support for SameSite
 * @param  string|null  $samesite 'Lax' or 'Strict'
 */
function setcookie_samesite($name, $value = '', $expire = 0, $path = null, $domain = null, $secure = false, $httponly = false, $samesite = null)
{
	$params = array(
		rawurlencode($name) . '=' . rawurlencode($value),
	);

	if ($expire)
	{
		$params[] = sprintf('expires=%d', $expire);
	}

	if (!is_null($path))
	{
		$params[] = sprintf('path=%s', rawurlencode($path));
	}

	if (!$is_null($domain))
	{
		$params[] = sprintf('domain=%s', rawurlencode($domain));
	}

	if ($secure)
	{
		$params[] = 'secure';
	}

	if ($httponly)
	{
		$params[] = 'httponly';
	}

	if ($samesite)
	{
		$params[] = sprintf('samesite=%s', rawurlencode($samesite));
	}

	$header = sprintf('Set-Cookie: %s', implode('; ', $params));

	return header($header, false);
}

Hi! Thanks for your code!
Used it beacause the setcookie-hack via. $path stops working in php 7.3

I had 2 problems:

• Removed the $ before is_null in line 23.
• couldn't specify path because rawurlencode replaces / with %2F

https://gist.github.com/tivus/1347934f782bd2b1e261493615b5444f