PHP替換和刪除？

Question

我有隨機的產品鏈接URL。

我想要的結果如同>

http://yourdomain.com/index.php?main_page=product_info&products_id=5 產品編號= 5 或 http://yourdomain.com/index.php?main_page=product_info&products_id=3210:cdfa96a858cdde666a79b09207528297 產品編號=

由於提前

Answer 1

$string = "http://yourdomain.com/index.php?main_page=product_info&products_id=5"; 
$pattern = "/products_id=(\d+)/"; 
preg_match($pattern, $string, $matches); 
$out = "Product Id = ".$matches[1];