[PHP] newbie question about preg_match

[Al]

I'm trying to compose a general purpose text snip expression to extract 
a text segment from a string.

Should this work for all reasonable cases?  It seems to work for several 
test strings. 

$start= "str1";
$end= "str2";
preg_match ("|$start (.*) ? $end |i", $contents, $text);
  
$segment= $text[1];

Thanks....
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