PHP: Set custom headers with cURL.

This is a guide on how to set custom request headers with PHP’s cuRL extension.

PHP: Send a 503 Service Temporarily Unavailable header.

This is a PHP tutorial on how to send a “503 Service Temporarily Unavailable” status code.

PHP: Check if date is a leap year.

This is a short guide on how to detect leap years using PHP.

Subtracting years from a date using PHP.

This is a tutorial on how to subtract years from a date using PHP.

PHP: Send a 405 Method Not Allowed header.

This is a short guide on how to send a 405 Method Not Allowed header with PHP.