Regular expression - php replace url?

Question

Before replacement: http://www.163.com/cc/Content before replacement/ After replacement http://www.163.com/cc/Content after replacement/

phpcn_u1582 · Answer

$str="http://www.163.com/cc/content before replacement/";
$preg = "/cc/(.+)//";
$after = preg_replace($preg, "To Replacement content", $str);

仅有的幸福 · Answer

$subject = preg_replace('//替换前内容\//', '/替换后内容/', 'http://www.163.com/cc/替换前内容/');
var_dump($subject);

漂亮男人 · Answer

$url = preg_replace('/替换前内容/', '替换后内容', 'http://www.163.com/cc/替换前内容/');
或者
$url = preg_replace('#替换前内容#', '替换后内容', 'http://www.163.com/cc/替换前内容/');