Php introduces two methods to filter html tags.

Php built-in function strip_tagsechostrip_tags (hello & lt; B & gt; world! Www.ite5e.com & lt;/B & gt;); user-defined function: functionfilterhtml ($ str) {& nbsp; & nbsp; $ streregi _ php built-in function strip_tags
Echo strip_tags ("hello World! Www.ite5e.com");

Custom functions:
Function filterhtml ($ str ){
$ Str = eregi_replace (" ] *> ", $ Str );
$ Str = str_replace ("", $ str );
$ Str = str_replace ("n", $ str );
$ Str = str_replace ("t", $ str );
$ Str = str_replace (":" ,:, $ str );
$ Str = str_replace ("", $ str );
// $ Str = str_replace ("", $ str );
Return $ str;
}
$ Str = "www.111cn.net ";
Call the echo filterhtml ($ str) function );