xml - PHP Increase Indentation of DOMDocument->saveXML? -

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i need increase indentation of formatted xml file 4 spaces 2 tried using regex powered xml formatter forgot indent closing tags on new line.

what options have, using preg_replace seems best option, search regex /( {2}^anything_except_space)/ that's far can seem get.

thanks, xeross

preg_replace('/^[ ]+(?=<)/m','$0$0',$string);

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