Clean text in php

[hellopal]

\[code\]--0-1946616131-1282798399=:21360 Content-Type: text/plain; charset=us-ascii -------------------- do not change ---------------------------- Ticket ID : #987336 --------------------------------------------------------------- Hello, This is my problem try to solve this thank u --0-1946616131-1282798399=:21360 Content-Type: text/html; charset=us-ascii"\[/code\]Now I want to remove - \[code\]--0-1946616131-1282798399=:21360 Content-Type: text/plain; charset=us-ascii\[/code\]and \[code\]--0-1946616131-1282798399=:21360 Content-Type: text/html; charset=us-ascii\[/code\]section from it. I mean clean the text.How can I do that?