How to replace the attachment tag in the document cyclically

Cainiao asks for instructions on how to repeatedly replace the attachment tag in the article. This post was last edited by qq33184 from 2015-09-0600: 32: 33 $ article [content] & nbsp; str_replace ([attach_40], & nbsp; $ this-& gt; get_attach_url (40)

This post was last edited by qq33184 on 00:32:33

$ Article ['content'] = str_replace ('[attach_40]', $ this-> get_attach_url ('40'), $ article ['content']);
$ Article ['content'] = str_replace ('[attach_41]', $ this-> get_attach_url ('41'), $ article ['content']);
$ Article ['content'] = str_replace ('[attach_42]', $ this-> get_attach_url ('42'), $ article ['content']);

Replacement rule
$ Article ['content'] = preg_replace ('/\ [attach _ (\ d +) \]/is', $ this-> get_attach_url ('\ 1 '), $ article ['content']);

Note:
$ Article ['content'] content
[Attach_42] in the attachment tag, the number indicates the ID of the attachment in the data table.
The get_attach_url () method obtains the complete attachment path, for example, http: // 127.0.0.10/attach/2015-09-05/1441449289 kWkS.jpg.

Cainiao asks for instructions on how to replace the attachment tag in the document cyclically
------ Solution ----------------------
Php5.5 or lower
$ Article ['content'] = preg_replace ('/\ [attach _ (\ d +) \]/ise', '$ this-> get_attach_url ("\ 1 ") ', $ article ['content']);

All versions are supported.
$ Article ['content'] = preg_replace_callback ('/\ [attach _ (\ d +) \]/is', array ($ this, 'get _ attach_url '), $ article ['content']);
However, you need to modify the get_attach_url method (change the array parameter to a single value parameter)

Php5.4 or above
$ Article ['content'] = preg_replace ('/\ [attach _ (\ d +) \]/is', function ($ m) {return $ this-> get_attach_url ($ m [1] ;}, $ article ['content']);
Although php5.3 supports closures, $ this cannot be used in closures.