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<?php $regex = '#<tag foo="bar">([\w\s]+)([^\s]+)</tag>#'; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo Nuzzi</tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo Nuzzi </tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo </tag>'). " $\n"; echo preg_replace($regex, '\1', '<tag foo="bar">Jacopo</tag>'). " $\n";
Output for git.master, git.master_jit, rfc.property-hooks
Jacopo Nuzz $ <tag foo="bar">Jacopo Nuzzi </tag> $ <tag foo="bar">Jacopo </tag> $ Jacop $

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