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By default in most regex engines, . doesn't match newline characters, so the matching stops at the end of each logical line. If you want . to match really everything, including newlines, you need to enable "dot-matches-all" mode in your regex engine of choice (for example, add re. DOTALL flag in Python, or /s in PCRE.
"\n" matches a newline character.
The dot matches all except newlines (\r\n). So use \s\S, which will match ALL characters.
You can then use \. \. or \. {2} to match exactly 2 dots.
You need to use the DOTALL modifier (/s).
'/<div>(.*)<\/div>/s'
This might not give you exactly what you want because you are greedy matching. You might instead try a non-greedy match:
'/<div>(.*?)<\/div>/s'
You could also solve this by matching everything except '<' if there aren't other tags:
'/<div>([^<]*)<\/div>/'
Another observation is that you don't need to use / as your regular expression delimiters. Using another character means that you don't have to escape the / in </div>, improving readability. This applies to all the above regular expressions. Here's it would look if you use '#' instead of '/':
'#<div>([^<]*)</div>#'
However all these solutions can fail due to nested divs, extra whitespace, HTML comments and various other things. HTML is too complicated to parse with Regex, so you should consider using an HTML parser instead.
To match all characters, you can use this trick:
%\<div\>([\s\S]*)\</div\>%
You can also use the (?s) mode modifier. For example,
(?s)/<div>(.*?)<\/div>
There shouldn't be any problem with just doing:
(.|\n)
This matches either any character except newline or a newline, so every character. It solved it for me, at least.
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