Lets say im trying to replace every occurance of 'hello' with '<b>hi</b>'.
Here's something that's probably close to what you want. Something else you need to worry about besides <img> tags is what if the word "hello" appears in a <a> tag? within Javascript?
This will match anything outside of tags, at least, and then add in the <strong> tags around "hello".
function callback($match)
{ return str_replace('hello','<strong>hello</strong>',$match[0]); }$new_str = preg_replace_callback('/>([^<]+)</','callback',$str);
-- ---John Holmes...
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