Is it possible for a different domain to read cookies set by another domain in PHP?

It is not possible for a different domain to directly read cookies set by another domain in PHP due to browser security restrictions known as the Same Origin Policy. One way to share information between domains is by using a server-side API to exchange data securely. This can involve sending encrypted tokens or using CORS (Cross-Origin Resource Sharing) headers to allow controlled access between domains. 

// Example PHP code snippet using CORS to allow controlled access between domains
header("Access-Control-Allow-Origin: https://example.com");
header("Access-Control-Allow-Credentials: true");

// Code to set a cookie
setcookie("cookie_name", "cookie_value", time() + 3600, "/", "example.com", true, true);

Keywords

cross-domain cookies PHP security same-origin

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