删除两个单词之间的所有错误字符串

Question

I've got a script which generates text. I need to be strip all repeated blocks of text. The string is in xml format, so I can use the beginning and ending tags to determine where the strings are. I've been using substr_replace to remove the unnecessary text... However, this only works if I know how many times said text is going to be present in the string. Example :

<container>
  <string1>This is the first string.</string>
  <string2>This is the second string.</string>
  <stuff>This is the important stuff.</stuff>
</container>

That container might appear once, twice six times, seven times, whatever. The point is, it's necessary to only have it appear once in the string variable. Right now this is what I'm doing.

$where_begin = strpos($wsman_output,'<container');
$where_end = strpos($wsman_output,"</container>");
$end_length = strlen("</Envelope>");
$attack = $where_end - $where_begin;
$attack = $attack + $end_length;
$wsman_output = substr_replace($wsman_output,"",$where_begin,$attack);

And I do that for each time the container exists.... However, I just found out that it's not always going to be the same.. Which really messes things up.

Any ideas?

Answer 1

In the end I decided to use the method suggested here .

I pulled each block of string I wanted from the variable, then combined them back together in the required order.