How to solve regular expression extraction code

Obtain a regular expression extraction code $ str = '& lt; a & nbsp; href = "http://item.taobao.com/item.htm? Id = 9694595974 & amp; ali_refid = a3_620362_1007: 1102370186: 7: 46702465U84
$ Str =' ';

For example, extract all the hyperlinks in the above strings. if there is a link similar to "id = 9694595974" (the number after id = is automatically generated by the system, in addition, the parameters followed by numbers sometimes exist and sometimes do not exist. in the example above (& ali_refid = a3_620362_1007: 1102370186: 7: Hangzhou & ali_trackid = Hangzhou), it may not exist ), replace this link with go. php? Id = 9694595974, and put the replaced link back to the original place. if the original link does not have a string similar to "id = 9694595974", replace this link with "#", and put it back to the original place (this string contains multiple "id = 9694595974" hyperlinks and multiple hyperlinks without "id = 9694595974 ),
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If the callback function is a class method, it needs to be passed in array form